1 /* 32-bit ELF support for Nios II.
2 Copyright (C) 2012-2016 Free Software Foundation, Inc.
4 Contributed by Mentor Graphics, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
23 /* This file handles Altera Nios II ELF targets. */
31 #include "elf/nios2.h"
32 #include "opcode/nios2.h"
33 #include "elf32-nios2.h"
35 /* Use RELA relocations. */
44 /* Forward declarations. */
45 static bfd_reloc_status_type nios2_elf32_ignore_reloc
46 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
47 static bfd_reloc_status_type nios2_elf32_hi16_relocate
48 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
49 static bfd_reloc_status_type nios2_elf32_lo16_relocate
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type nios2_elf32_hiadj16_relocate
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type nios2_elf32_pcrel_lo16_relocate
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type nios2_elf32_pcrel_hiadj16_relocate
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static bfd_reloc_status_type nios2_elf32_pcrel16_relocate
58 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
59 static bfd_reloc_status_type nios2_elf32_call26_relocate
60 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
61 static bfd_reloc_status_type nios2_elf32_gprel_relocate
62 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
63 static bfd_reloc_status_type nios2_elf32_ujmp_relocate
64 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
65 static bfd_reloc_status_type nios2_elf32_cjmp_relocate
66 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
67 static bfd_reloc_status_type nios2_elf32_callr_relocate
68 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
71 extern const bfd_target nios2_elf32_le_vec;
72 extern const bfd_target nios2_elf32_be_vec;
74 /* Offset of tp and dtp pointers from start of TLS block. */
75 #define TP_OFFSET 0x7000
76 #define DTP_OFFSET 0x8000
78 /* The relocation tables used for SHT_REL sections. There are separate
79 tables for R1 and R2 encodings. */
80 static reloc_howto_type elf_nios2_r1_howto_table_rel[] = {
82 HOWTO (R_NIOS2_NONE, /* type */
84 3, /* size (0 = byte, 1 = short, 2 = long) */
86 FALSE, /* pc_relative */
88 complain_overflow_dont, /* complain_on_overflow */
89 bfd_elf_generic_reloc, /* special_function */
90 "R_NIOS2_NONE", /* name */
91 FALSE, /* partial_inplace */
94 FALSE), /* pcrel_offset */
96 /* 16-bit signed immediate relocation. */
97 HOWTO (R_NIOS2_S16, /* type */
99 2, /* size (0 = byte, 1 = short, 2 = long) */
101 FALSE, /* pc_relative */
103 complain_overflow_signed, /* complain on overflow */
104 bfd_elf_generic_reloc, /* special function */
105 "R_NIOS2_S16", /* name */
106 FALSE, /* partial_inplace */
107 0x003fffc0, /* src_mask */
108 0x003fffc0, /* dest_mask */
109 FALSE), /* pcrel_offset */
111 /* 16-bit unsigned immediate relocation. */
112 HOWTO (R_NIOS2_U16, /* type */
114 2, /* size (0 = byte, 1 = short, 2 = long) */
116 FALSE, /* pc_relative */
118 complain_overflow_unsigned, /* complain on overflow */
119 bfd_elf_generic_reloc, /* special function */
120 "R_NIOS2_U16", /* name */
121 FALSE, /* partial_inplace */
122 0x003fffc0, /* src_mask */
123 0x003fffc0, /* dest_mask */
124 FALSE), /* pcrel_offset */
126 HOWTO (R_NIOS2_PCREL16, /* type */
128 2, /* size (0 = byte, 1 = short, 2 = long) */
130 TRUE, /* pc_relative */
132 complain_overflow_signed, /* complain on overflow */
133 nios2_elf32_pcrel16_relocate, /* special function */
134 "R_NIOS2_PCREL16", /* name */
135 FALSE, /* partial_inplace */
136 0x003fffc0, /* src_mask */
137 0x003fffc0, /* dest_mask */
138 TRUE), /* pcrel_offset */
140 HOWTO (R_NIOS2_CALL26, /* type */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
144 FALSE, /* pc_relative */
146 complain_overflow_dont, /* complain on overflow */
147 nios2_elf32_call26_relocate, /* special function */
148 "R_NIOS2_CALL26", /* name */
149 FALSE, /* partial_inplace */
150 0xffffffc0, /* src_mask */
151 0xffffffc0, /* dst_mask */
152 FALSE), /* pcrel_offset */
160 complain_overflow_bitfield,
161 bfd_elf_generic_reloc,
168 HOWTO (R_NIOS2_CACHE_OPX,
174 complain_overflow_bitfield,
175 bfd_elf_generic_reloc,
188 complain_overflow_bitfield,
189 bfd_elf_generic_reloc,
202 complain_overflow_bitfield,
203 bfd_elf_generic_reloc,
216 complain_overflow_dont,
217 nios2_elf32_hi16_relocate,
230 complain_overflow_dont,
231 nios2_elf32_lo16_relocate,
238 HOWTO (R_NIOS2_HIADJ16,
244 complain_overflow_dont,
245 nios2_elf32_hiadj16_relocate,
252 HOWTO (R_NIOS2_BFD_RELOC_32,
258 complain_overflow_dont,
259 bfd_elf_generic_reloc,
260 "R_NIOS2_BFD_RELOC32",
266 HOWTO (R_NIOS2_BFD_RELOC_16,
272 complain_overflow_bitfield,
273 bfd_elf_generic_reloc,
274 "R_NIOS2_BFD_RELOC16",
280 HOWTO (R_NIOS2_BFD_RELOC_8,
286 complain_overflow_bitfield,
287 bfd_elf_generic_reloc,
288 "R_NIOS2_BFD_RELOC8",
294 HOWTO (R_NIOS2_GPREL,
300 complain_overflow_dont,
301 nios2_elf32_gprel_relocate,
308 HOWTO (R_NIOS2_GNU_VTINHERIT,
314 complain_overflow_dont,
316 "R_NIOS2_GNU_VTINHERIT",
322 HOWTO (R_NIOS2_GNU_VTENTRY,
328 complain_overflow_dont,
329 _bfd_elf_rel_vtable_reloc_fn,
330 "R_NIOS2_GNU_VTENTRY",
342 complain_overflow_dont,
343 nios2_elf32_ujmp_relocate,
356 complain_overflow_dont,
357 nios2_elf32_cjmp_relocate,
364 HOWTO (R_NIOS2_CALLR,
370 complain_overflow_dont,
371 nios2_elf32_callr_relocate,
378 HOWTO (R_NIOS2_ALIGN,
384 complain_overflow_dont,
385 nios2_elf32_ignore_reloc,
393 HOWTO (R_NIOS2_GOT16,
399 complain_overflow_bitfield,
400 bfd_elf_generic_reloc,
407 HOWTO (R_NIOS2_CALL16,
413 complain_overflow_bitfield,
414 bfd_elf_generic_reloc,
421 HOWTO (R_NIOS2_GOTOFF_LO,
427 complain_overflow_dont,
428 bfd_elf_generic_reloc,
435 HOWTO (R_NIOS2_GOTOFF_HA,
441 complain_overflow_dont,
442 bfd_elf_generic_reloc,
449 HOWTO (R_NIOS2_PCREL_LO,
455 complain_overflow_dont,
456 nios2_elf32_pcrel_lo16_relocate,
463 HOWTO (R_NIOS2_PCREL_HA,
467 FALSE, /* This is a PC-relative relocation, but we need to subtract
468 PC ourselves before the HIADJ. */
470 complain_overflow_dont,
471 nios2_elf32_pcrel_hiadj16_relocate,
478 HOWTO (R_NIOS2_TLS_GD16,
484 complain_overflow_bitfield,
485 bfd_elf_generic_reloc,
492 HOWTO (R_NIOS2_TLS_LDM16,
498 complain_overflow_bitfield,
499 bfd_elf_generic_reloc,
506 HOWTO (R_NIOS2_TLS_LDO16,
512 complain_overflow_bitfield,
513 bfd_elf_generic_reloc,
520 HOWTO (R_NIOS2_TLS_IE16,
526 complain_overflow_bitfield,
527 bfd_elf_generic_reloc,
534 HOWTO (R_NIOS2_TLS_LE16,
540 complain_overflow_bitfield,
541 bfd_elf_generic_reloc,
548 HOWTO (R_NIOS2_TLS_DTPMOD,
554 complain_overflow_dont,
555 bfd_elf_generic_reloc,
556 "R_NIOS2_TLS_DTPMOD",
562 HOWTO (R_NIOS2_TLS_DTPREL,
568 complain_overflow_dont,
569 bfd_elf_generic_reloc,
570 "R_NIOS2_TLS_DTPREL",
576 HOWTO (R_NIOS2_TLS_TPREL,
582 complain_overflow_dont,
583 bfd_elf_generic_reloc,
596 complain_overflow_dont,
597 bfd_elf_generic_reloc,
604 HOWTO (R_NIOS2_GLOB_DAT,
610 complain_overflow_dont,
611 bfd_elf_generic_reloc,
618 HOWTO (R_NIOS2_JUMP_SLOT,
624 complain_overflow_dont,
625 bfd_elf_generic_reloc,
632 HOWTO (R_NIOS2_RELATIVE,
638 complain_overflow_dont,
639 bfd_elf_generic_reloc,
646 HOWTO (R_NIOS2_GOTOFF,
652 complain_overflow_dont,
653 bfd_elf_generic_reloc,
660 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
662 2, /* size (0 = byte, 1 = short, 2 = long) */
664 FALSE, /* pc_relative */
666 complain_overflow_dont, /* complain on overflow */
667 nios2_elf32_call26_relocate, /* special function */
668 "R_NIOS2_CALL26_NOAT", /* name */
669 FALSE, /* partial_inplace */
670 0xffffffc0, /* src_mask */
671 0xffffffc0, /* dst_mask */
672 FALSE), /* pcrel_offset */
674 HOWTO (R_NIOS2_GOT_LO,
680 complain_overflow_dont,
681 bfd_elf_generic_reloc,
688 HOWTO (R_NIOS2_GOT_HA,
694 complain_overflow_dont,
695 bfd_elf_generic_reloc,
702 HOWTO (R_NIOS2_CALL_LO,
708 complain_overflow_dont,
709 bfd_elf_generic_reloc,
716 HOWTO (R_NIOS2_CALL_HA,
722 complain_overflow_dont,
723 bfd_elf_generic_reloc,
730 /* Add other relocations here. */
733 static reloc_howto_type elf_nios2_r2_howto_table_rel[] = {
735 HOWTO (R_NIOS2_NONE, /* type */
737 0, /* size (0 = byte, 1 = short, 2 = long) */
739 FALSE, /* pc_relative */
741 complain_overflow_dont, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_NIOS2_NONE", /* name */
744 FALSE, /* partial_inplace */
747 FALSE), /* pcrel_offset */
749 /* 16-bit signed immediate relocation. */
750 HOWTO (R_NIOS2_S16, /* type */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
754 FALSE, /* pc_relative */
756 complain_overflow_signed, /* complain on overflow */
757 bfd_elf_generic_reloc, /* special function */
758 "R_NIOS2_S16", /* name */
759 FALSE, /* partial_inplace */
760 0xffff0000, /* src_mask */
761 0xffff0000, /* dest_mask */
762 FALSE), /* pcrel_offset */
764 /* 16-bit unsigned immediate relocation. */
765 HOWTO (R_NIOS2_U16, /* type */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
769 FALSE, /* pc_relative */
771 complain_overflow_unsigned, /* complain on overflow */
772 bfd_elf_generic_reloc, /* special function */
773 "R_NIOS2_U16", /* name */
774 FALSE, /* partial_inplace */
775 0xffff0000, /* src_mask */
776 0xffff0000, /* dest_mask */
777 FALSE), /* pcrel_offset */
779 HOWTO (R_NIOS2_PCREL16, /* type */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
783 TRUE, /* pc_relative */
785 complain_overflow_signed, /* complain on overflow */
786 nios2_elf32_pcrel16_relocate, /* special function */
787 "R_NIOS2_PCREL16", /* name */
788 FALSE, /* partial_inplace */
789 0xffff0000, /* src_mask */
790 0xffff0000, /* dest_mask */
791 TRUE), /* pcrel_offset */
793 HOWTO (R_NIOS2_CALL26, /* type */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
797 FALSE, /* pc_relative */
799 complain_overflow_dont, /* complain on overflow */
800 nios2_elf32_call26_relocate, /* special function */
801 "R_NIOS2_CALL26", /* name */
802 FALSE, /* partial_inplace */
803 0xffffffc0, /* src_mask */
804 0xffffffc0, /* dst_mask */
805 FALSE), /* pcrel_offset */
813 complain_overflow_bitfield,
814 bfd_elf_generic_reloc,
821 HOWTO (R_NIOS2_CACHE_OPX,
827 complain_overflow_bitfield,
828 bfd_elf_generic_reloc,
841 complain_overflow_bitfield,
842 bfd_elf_generic_reloc,
855 complain_overflow_bitfield,
856 bfd_elf_generic_reloc,
869 complain_overflow_dont,
870 nios2_elf32_hi16_relocate,
883 complain_overflow_dont,
884 nios2_elf32_lo16_relocate,
891 HOWTO (R_NIOS2_HIADJ16,
897 complain_overflow_dont,
898 nios2_elf32_hiadj16_relocate,
905 HOWTO (R_NIOS2_BFD_RELOC_32,
911 complain_overflow_dont,
912 bfd_elf_generic_reloc,
913 "R_NIOS2_BFD_RELOC32",
919 HOWTO (R_NIOS2_BFD_RELOC_16,
925 complain_overflow_bitfield,
926 bfd_elf_generic_reloc,
927 "R_NIOS2_BFD_RELOC16",
933 HOWTO (R_NIOS2_BFD_RELOC_8,
939 complain_overflow_bitfield,
940 bfd_elf_generic_reloc,
941 "R_NIOS2_BFD_RELOC8",
947 HOWTO (R_NIOS2_GPREL,
953 complain_overflow_dont,
954 nios2_elf32_gprel_relocate,
961 HOWTO (R_NIOS2_GNU_VTINHERIT,
967 complain_overflow_dont,
969 "R_NIOS2_GNU_VTINHERIT",
975 HOWTO (R_NIOS2_GNU_VTENTRY,
981 complain_overflow_dont,
982 _bfd_elf_rel_vtable_reloc_fn,
983 "R_NIOS2_GNU_VTENTRY",
995 complain_overflow_dont,
996 nios2_elf32_ujmp_relocate,
1003 HOWTO (R_NIOS2_CJMP,
1009 complain_overflow_dont,
1010 nios2_elf32_cjmp_relocate,
1017 HOWTO (R_NIOS2_CALLR,
1023 complain_overflow_dont,
1024 nios2_elf32_callr_relocate,
1031 HOWTO (R_NIOS2_ALIGN,
1037 complain_overflow_dont,
1038 nios2_elf32_ignore_reloc,
1045 HOWTO (R_NIOS2_GOT16,
1051 complain_overflow_bitfield,
1052 bfd_elf_generic_reloc,
1059 HOWTO (R_NIOS2_CALL16,
1065 complain_overflow_bitfield,
1066 bfd_elf_generic_reloc,
1073 HOWTO (R_NIOS2_GOTOFF_LO,
1079 complain_overflow_dont,
1080 bfd_elf_generic_reloc,
1081 "R_NIOS2_GOTOFF_LO",
1087 HOWTO (R_NIOS2_GOTOFF_HA,
1093 complain_overflow_dont,
1094 bfd_elf_generic_reloc,
1095 "R_NIOS2_GOTOFF_HA",
1101 HOWTO (R_NIOS2_PCREL_LO,
1107 complain_overflow_dont,
1108 nios2_elf32_pcrel_lo16_relocate,
1115 HOWTO (R_NIOS2_PCREL_HA,
1119 FALSE, /* This is a PC-relative relocation, but we need to subtract
1120 PC ourselves before the HIADJ. */
1122 complain_overflow_dont,
1123 nios2_elf32_pcrel_hiadj16_relocate,
1130 HOWTO (R_NIOS2_TLS_GD16,
1136 complain_overflow_bitfield,
1137 bfd_elf_generic_reloc,
1144 HOWTO (R_NIOS2_TLS_LDM16,
1150 complain_overflow_bitfield,
1151 bfd_elf_generic_reloc,
1152 "R_NIOS2_TLS_LDM16",
1158 HOWTO (R_NIOS2_TLS_LDO16,
1164 complain_overflow_bitfield,
1165 bfd_elf_generic_reloc,
1166 "R_NIOS2_TLS_LDO16",
1172 HOWTO (R_NIOS2_TLS_IE16,
1178 complain_overflow_bitfield,
1179 bfd_elf_generic_reloc,
1186 HOWTO (R_NIOS2_TLS_LE16,
1192 complain_overflow_bitfield,
1193 bfd_elf_generic_reloc,
1200 HOWTO (R_NIOS2_TLS_DTPMOD,
1206 complain_overflow_dont,
1207 bfd_elf_generic_reloc,
1208 "R_NIOS2_TLS_DTPMOD",
1214 HOWTO (R_NIOS2_TLS_DTPREL,
1220 complain_overflow_dont,
1221 bfd_elf_generic_reloc,
1222 "R_NIOS2_TLS_DTPREL",
1228 HOWTO (R_NIOS2_TLS_TPREL,
1234 complain_overflow_dont,
1235 bfd_elf_generic_reloc,
1236 "R_NIOS2_TLS_TPREL",
1242 HOWTO (R_NIOS2_COPY,
1248 complain_overflow_dont,
1249 bfd_elf_generic_reloc,
1256 HOWTO (R_NIOS2_GLOB_DAT,
1262 complain_overflow_dont,
1263 bfd_elf_generic_reloc,
1270 HOWTO (R_NIOS2_JUMP_SLOT,
1276 complain_overflow_dont,
1277 bfd_elf_generic_reloc,
1278 "R_NIOS2_JUMP_SLOT",
1284 HOWTO (R_NIOS2_RELATIVE,
1290 complain_overflow_dont,
1291 bfd_elf_generic_reloc,
1298 HOWTO (R_NIOS2_GOTOFF,
1304 complain_overflow_dont,
1305 bfd_elf_generic_reloc,
1312 HOWTO (R_NIOS2_CALL26_NOAT, /* type */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 FALSE, /* pc_relative */
1318 complain_overflow_dont, /* complain on overflow */
1319 nios2_elf32_call26_relocate, /* special function */
1320 "R_NIOS2_CALL26_NOAT", /* name */
1321 FALSE, /* partial_inplace */
1322 0xffffffc0, /* src_mask */
1323 0xffffffc0, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1326 HOWTO (R_NIOS2_GOT_LO,
1332 complain_overflow_dont,
1333 bfd_elf_generic_reloc,
1340 HOWTO (R_NIOS2_GOT_HA,
1346 complain_overflow_dont,
1347 bfd_elf_generic_reloc,
1354 HOWTO (R_NIOS2_CALL_LO,
1360 complain_overflow_dont,
1361 bfd_elf_generic_reloc,
1368 HOWTO (R_NIOS2_CALL_HA,
1374 complain_overflow_dont,
1375 bfd_elf_generic_reloc,
1382 HOWTO (R_NIOS2_R2_S12,
1388 complain_overflow_signed,
1389 bfd_elf_generic_reloc,
1396 HOWTO (R_NIOS2_R2_I10_1_PCREL,
1402 complain_overflow_signed,
1403 bfd_elf_generic_reloc, /* FIXME? */
1404 "R_NIOS2_R2_I10_1_PCREL",
1410 HOWTO (R_NIOS2_R2_T1I7_1_PCREL,
1416 complain_overflow_signed,
1417 bfd_elf_generic_reloc, /* FIXME? */
1418 "R_NIOS2_R2_T1I7_1_PCREL",
1424 HOWTO (R_NIOS2_R2_T1I7_2,
1430 complain_overflow_unsigned,
1431 bfd_elf_generic_reloc,
1432 "R_NIOS2_R2_T1I7_2",
1438 HOWTO (R_NIOS2_R2_T2I4,
1444 complain_overflow_unsigned,
1445 bfd_elf_generic_reloc,
1452 HOWTO (R_NIOS2_R2_T2I4_1,
1458 complain_overflow_unsigned,
1459 bfd_elf_generic_reloc,
1460 "R_NIOS2_R2_T2I4_1",
1466 HOWTO (R_NIOS2_R2_T2I4_2,
1472 complain_overflow_unsigned,
1473 bfd_elf_generic_reloc,
1474 "R_NIOS2_R2_T2I4_2",
1480 HOWTO (R_NIOS2_R2_X1I7_2,
1486 complain_overflow_unsigned,
1487 bfd_elf_generic_reloc,
1488 "R_NIOS2_R2_X1I7_2",
1494 HOWTO (R_NIOS2_R2_X2L5,
1500 complain_overflow_unsigned,
1501 bfd_elf_generic_reloc,
1508 HOWTO (R_NIOS2_R2_F1I5_2,
1514 complain_overflow_unsigned,
1515 bfd_elf_generic_reloc,
1516 "R_NIOS2_R2_F1L5_2",
1522 HOWTO (R_NIOS2_R2_L5I4X1,
1528 complain_overflow_unsigned,
1529 bfd_elf_generic_reloc,
1530 "R_NIOS2_R2_L5I4X1",
1536 HOWTO (R_NIOS2_R2_T1X1I6,
1542 complain_overflow_unsigned,
1543 bfd_elf_generic_reloc,
1544 "R_NIOS2_R2_T1X1I6",
1550 HOWTO (R_NIOS2_R2_T1X1I6_2,
1556 complain_overflow_unsigned,
1557 bfd_elf_generic_reloc,
1558 "R_NIOS2_R2_T1I1X6_2",
1564 /* Add other relocations here. */
1567 static unsigned char elf_code_to_howto_index[R_NIOS2_ILLEGAL + 1];
1570 /* Return true if producing output for a R2 BFD. */
1571 #define BFD_IS_R2(abfd) (bfd_get_mach (abfd) == bfd_mach_nios2r2)
1573 /* Return the howto for relocation RTYPE. */
1574 static reloc_howto_type *
1575 lookup_howto (unsigned int rtype, bfd *abfd)
1577 static int initialized = 0;
1579 /* R2 relocations are a superset of R1, so use that for the lookup
1581 int r1_howto_tbl_size = (int) (sizeof (elf_nios2_r1_howto_table_rel)
1582 / sizeof (elf_nios2_r1_howto_table_rel[0]));
1583 int r2_howto_tbl_size = (int) (sizeof (elf_nios2_r2_howto_table_rel)
1584 / sizeof (elf_nios2_r2_howto_table_rel[0]));
1589 memset (elf_code_to_howto_index, 0xff,
1590 sizeof (elf_code_to_howto_index));
1591 for (i = 0; i < r2_howto_tbl_size; i++)
1593 elf_code_to_howto_index[elf_nios2_r2_howto_table_rel[i].type] = i;
1594 if (i < r1_howto_tbl_size)
1595 BFD_ASSERT (elf_nios2_r2_howto_table_rel[i].type
1596 == elf_nios2_r1_howto_table_rel[i].type);
1600 BFD_ASSERT (rtype <= R_NIOS2_ILLEGAL);
1601 i = elf_code_to_howto_index[rtype];
1602 if (BFD_IS_R2 (abfd))
1604 if (i >= r2_howto_tbl_size)
1606 return elf_nios2_r2_howto_table_rel + i;
1610 if (i >= r1_howto_tbl_size)
1612 return elf_nios2_r1_howto_table_rel + i;
1616 /* Map for converting BFD reloc types to Nios II reloc types. */
1617 struct elf_reloc_map
1619 bfd_reloc_code_real_type bfd_val;
1620 enum elf_nios2_reloc_type elf_val;
1623 static const struct elf_reloc_map nios2_reloc_map[] = {
1624 {BFD_RELOC_NONE, R_NIOS2_NONE},
1625 {BFD_RELOC_NIOS2_S16, R_NIOS2_S16},
1626 {BFD_RELOC_NIOS2_U16, R_NIOS2_U16},
1627 {BFD_RELOC_16_PCREL, R_NIOS2_PCREL16},
1628 {BFD_RELOC_NIOS2_CALL26, R_NIOS2_CALL26},
1629 {BFD_RELOC_NIOS2_IMM5, R_NIOS2_IMM5},
1630 {BFD_RELOC_NIOS2_CACHE_OPX, R_NIOS2_CACHE_OPX},
1631 {BFD_RELOC_NIOS2_IMM6, R_NIOS2_IMM6},
1632 {BFD_RELOC_NIOS2_IMM8, R_NIOS2_IMM8},
1633 {BFD_RELOC_NIOS2_HI16, R_NIOS2_HI16},
1634 {BFD_RELOC_NIOS2_LO16, R_NIOS2_LO16},
1635 {BFD_RELOC_NIOS2_HIADJ16, R_NIOS2_HIADJ16},
1636 {BFD_RELOC_32, R_NIOS2_BFD_RELOC_32},
1637 {BFD_RELOC_16, R_NIOS2_BFD_RELOC_16},
1638 {BFD_RELOC_8, R_NIOS2_BFD_RELOC_8},
1639 {BFD_RELOC_NIOS2_GPREL, R_NIOS2_GPREL},
1640 {BFD_RELOC_VTABLE_INHERIT, R_NIOS2_GNU_VTINHERIT},
1641 {BFD_RELOC_VTABLE_ENTRY, R_NIOS2_GNU_VTENTRY},
1642 {BFD_RELOC_NIOS2_UJMP, R_NIOS2_UJMP},
1643 {BFD_RELOC_NIOS2_CJMP, R_NIOS2_CJMP},
1644 {BFD_RELOC_NIOS2_CALLR, R_NIOS2_CALLR},
1645 {BFD_RELOC_NIOS2_ALIGN, R_NIOS2_ALIGN},
1646 {BFD_RELOC_NIOS2_GOT16, R_NIOS2_GOT16},
1647 {BFD_RELOC_NIOS2_CALL16, R_NIOS2_CALL16},
1648 {BFD_RELOC_NIOS2_GOTOFF_LO, R_NIOS2_GOTOFF_LO},
1649 {BFD_RELOC_NIOS2_GOTOFF_HA, R_NIOS2_GOTOFF_HA},
1650 {BFD_RELOC_NIOS2_PCREL_LO, R_NIOS2_PCREL_LO},
1651 {BFD_RELOC_NIOS2_PCREL_HA, R_NIOS2_PCREL_HA},
1652 {BFD_RELOC_NIOS2_TLS_GD16, R_NIOS2_TLS_GD16},
1653 {BFD_RELOC_NIOS2_TLS_LDM16, R_NIOS2_TLS_LDM16},
1654 {BFD_RELOC_NIOS2_TLS_LDO16, R_NIOS2_TLS_LDO16},
1655 {BFD_RELOC_NIOS2_TLS_IE16, R_NIOS2_TLS_IE16},
1656 {BFD_RELOC_NIOS2_TLS_LE16, R_NIOS2_TLS_LE16},
1657 {BFD_RELOC_NIOS2_TLS_DTPMOD, R_NIOS2_TLS_DTPMOD},
1658 {BFD_RELOC_NIOS2_TLS_DTPREL, R_NIOS2_TLS_DTPREL},
1659 {BFD_RELOC_NIOS2_TLS_TPREL, R_NIOS2_TLS_TPREL},
1660 {BFD_RELOC_NIOS2_COPY, R_NIOS2_COPY},
1661 {BFD_RELOC_NIOS2_GLOB_DAT, R_NIOS2_GLOB_DAT},
1662 {BFD_RELOC_NIOS2_JUMP_SLOT, R_NIOS2_JUMP_SLOT},
1663 {BFD_RELOC_NIOS2_RELATIVE, R_NIOS2_RELATIVE},
1664 {BFD_RELOC_NIOS2_GOTOFF, R_NIOS2_GOTOFF},
1665 {BFD_RELOC_NIOS2_CALL26_NOAT, R_NIOS2_CALL26_NOAT},
1666 {BFD_RELOC_NIOS2_GOT_LO, R_NIOS2_GOT_LO},
1667 {BFD_RELOC_NIOS2_GOT_HA, R_NIOS2_GOT_HA},
1668 {BFD_RELOC_NIOS2_CALL_LO, R_NIOS2_CALL_LO},
1669 {BFD_RELOC_NIOS2_CALL_HA, R_NIOS2_CALL_HA},
1670 {BFD_RELOC_NIOS2_R2_S12, R_NIOS2_R2_S12},
1671 {BFD_RELOC_NIOS2_R2_I10_1_PCREL, R_NIOS2_R2_I10_1_PCREL},
1672 {BFD_RELOC_NIOS2_R2_T1I7_1_PCREL, R_NIOS2_R2_T1I7_1_PCREL},
1673 {BFD_RELOC_NIOS2_R2_T1I7_2, R_NIOS2_R2_T1I7_2},
1674 {BFD_RELOC_NIOS2_R2_T2I4, R_NIOS2_R2_T2I4},
1675 {BFD_RELOC_NIOS2_R2_T2I4_1, R_NIOS2_R2_T2I4_1},
1676 {BFD_RELOC_NIOS2_R2_T2I4_2, R_NIOS2_R2_T2I4_2},
1677 {BFD_RELOC_NIOS2_R2_X1I7_2, R_NIOS2_R2_X1I7_2},
1678 {BFD_RELOC_NIOS2_R2_X2L5, R_NIOS2_R2_X2L5},
1679 {BFD_RELOC_NIOS2_R2_F1I5_2, R_NIOS2_R2_F1I5_2},
1680 {BFD_RELOC_NIOS2_R2_L5I4X1, R_NIOS2_R2_L5I4X1},
1681 {BFD_RELOC_NIOS2_R2_T1X1I6, R_NIOS2_R2_T1X1I6},
1682 {BFD_RELOC_NIOS2_R2_T1X1I6_2, R_NIOS2_R2_T1X1I6_2},
1685 enum elf32_nios2_stub_type
1687 nios2_stub_call26_before,
1688 nios2_stub_call26_after,
1692 struct elf32_nios2_stub_hash_entry
1694 /* Base hash table entry structure. */
1695 struct bfd_hash_entry bh_root;
1697 /* The stub section. */
1700 /* Offset within stub_sec of the beginning of this stub. */
1701 bfd_vma stub_offset;
1703 /* Given the symbol's value and its section we can determine its final
1704 value when building the stubs (so the stub knows where to jump. */
1705 bfd_vma target_value;
1706 asection *target_section;
1708 enum elf32_nios2_stub_type stub_type;
1710 /* The symbol table entry, if any, that this was derived from. */
1711 struct elf32_nios2_link_hash_entry *hh;
1713 /* And the reloc addend that this was derived from. */
1716 /* Where this stub is being called from, or, in the case of combined
1717 stub sections, the first input section in the group. */
1721 #define nios2_stub_hash_entry(ent) \
1722 ((struct elf32_nios2_stub_hash_entry *)(ent))
1724 #define nios2_stub_hash_lookup(table, string, create, copy) \
1725 ((struct elf32_nios2_stub_hash_entry *) \
1726 bfd_hash_lookup ((table), (string), (create), (copy)))
1729 /* The Nios II linker needs to keep track of the number of relocs that it
1730 decides to copy as dynamic relocs in check_relocs for each symbol.
1731 This is so that it can later discard them if they are found to be
1732 unnecessary. We store the information in a field extending the
1733 regular ELF linker hash table. */
1735 struct elf32_nios2_dyn_relocs
1737 struct elf32_nios2_dyn_relocs *next;
1739 /* The input section of the reloc. */
1742 /* Total number of relocs copied for the input section. */
1743 bfd_size_type count;
1745 /* Number of pc-relative relocs copied for the input section. */
1746 bfd_size_type pc_count;
1749 /* Nios II ELF linker hash entry. */
1751 struct elf32_nios2_link_hash_entry
1753 struct elf_link_hash_entry root;
1755 /* A pointer to the most recently used stub hash entry against this
1757 struct elf32_nios2_stub_hash_entry *hsh_cache;
1759 /* Track dynamic relocs copied for this symbol. */
1760 struct elf32_nios2_dyn_relocs *dyn_relocs;
1762 #define GOT_UNKNOWN 0
1763 #define GOT_NORMAL 1
1764 #define GOT_TLS_GD 2
1765 #define GOT_TLS_IE 4
1766 unsigned char tls_type;
1768 /* We need to detect and take special action for symbols which are only
1769 referenced with %call() and not with %got(). Such symbols do not need
1770 a dynamic GOT reloc in shared objects, only a dynamic PLT reloc. Lazy
1771 linking will not work if the dynamic GOT reloc exists.
1772 To check for this condition efficiently, we compare got_types_used against
1774 (got_types_used & (GOT_USED | CALL_USED)) == CALL_USED.
1778 unsigned char got_types_used;
1781 #define elf32_nios2_hash_entry(ent) \
1782 ((struct elf32_nios2_link_hash_entry *) (ent))
1784 /* Get the Nios II elf linker hash table from a link_info structure. */
1785 #define elf32_nios2_hash_table(info) \
1786 ((struct elf32_nios2_link_hash_table *) ((info)->hash))
1788 /* Nios II ELF linker hash table. */
1789 struct elf32_nios2_link_hash_table
1791 /* The main hash table. */
1792 struct elf_link_hash_table root;
1794 /* The stub hash table. */
1795 struct bfd_hash_table bstab;
1797 /* Linker stub bfd. */
1800 /* Linker call-backs. */
1801 asection * (*add_stub_section) (const char *, asection *, bfd_boolean);
1802 void (*layout_sections_again) (void);
1804 /* Array to keep track of which stub sections have been created, and
1805 information on stub grouping. */
1808 /* These are the section to which stubs in the group will be
1810 asection *first_sec, *last_sec;
1811 /* The stub sections. There might be stubs inserted either before
1812 or after the real section.*/
1813 asection *first_stub_sec, *last_stub_sec;
1816 /* Assorted information used by nios2_elf32_size_stubs. */
1817 unsigned int bfd_count;
1818 unsigned int top_index;
1819 asection **input_list;
1820 Elf_Internal_Sym **all_local_syms;
1822 /* Short-cuts to get to dynamic linker sections. */
1827 /* GOT pointer symbol _gp_got. */
1828 struct elf_link_hash_entry *h_gp_got;
1831 bfd_signed_vma refcount;
1835 /* Small local sym cache. */
1836 struct sym_cache sym_cache;
1841 struct nios2_elf32_obj_tdata
1843 struct elf_obj_tdata root;
1845 /* tls_type for each local got entry. */
1846 char *local_got_tls_type;
1848 /* TRUE if TLS GD relocs have been seen for this object. */
1849 bfd_boolean has_tlsgd;
1852 #define elf32_nios2_tdata(abfd) \
1853 ((struct nios2_elf32_obj_tdata *) (abfd)->tdata.any)
1855 #define elf32_nios2_local_got_tls_type(abfd) \
1856 (elf32_nios2_tdata (abfd)->local_got_tls_type)
1858 /* The name of the dynamic interpreter. This is put in the .interp
1860 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1862 /* PLT implementation for position-dependent code. */
1863 static const bfd_vma nios2_plt_entry[] = { /* .PLTn: */
1864 0x03c00034, /* movhi r15, %hiadj(plt_got_slot_address) */
1865 0x7bc00017, /* ldw r15, %lo(plt_got_slot_address)(r15) */
1866 0x7800683a /* jmp r15 */
1869 static const bfd_vma nios2_plt0_entry[] = { /* .PLTresolve */
1870 0x03800034, /* movhi r14, %hiadj(res_0) */
1871 0x73800004, /* addi r14, r14, %lo(res_0) */
1872 0x7b9fc83a, /* sub r15, r15, r14 */
1873 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1874 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1875 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1876 0x6800683a /* jmp r13 */
1879 /* PLT implementation for position-independent code. */
1880 static const bfd_vma nios2_so_plt_entry[] = { /* .PLTn */
1881 0x03c00034, /* movhi r15, %hiadj(index * 4) */
1882 0x7bc00004, /* addi r15, r15, %lo(index * 4) */
1883 0x00000006 /* br .PLTresolve */
1886 static const bfd_vma nios2_so_plt0_entry[] = { /* .PLTresolve */
1887 0x001ce03a, /* nextpc r14 */
1888 0x03400034, /* movhi r13, %hiadj(_GLOBAL_OFFSET_TABLE_) */
1889 0x6b9b883a, /* add r13, r13, r14 */
1890 0x6b800017, /* ldw r14, %lo(_GLOBAL_OFFSET_TABLE_+4)(r13) */
1891 0x6b400017, /* ldw r13, %lo(_GLOBAL_OFFSET_TABLE_+8)(r13) */
1892 0x6800683a /* jmp r13 */
1896 static const bfd_vma nios2_call26_stub_entry[] = {
1897 0x00400034, /* orhi at, r0, %hiadj(dest) */
1898 0x08400004, /* addi at, at, %lo(dest) */
1899 0x0800683a /* jmp at */
1902 /* Install 16-bit immediate value VALUE at offset OFFSET into section SEC. */
1904 nios2_elf32_install_imm16 (asection *sec, bfd_vma offset, bfd_vma value)
1906 bfd_vma word = bfd_get_32 (sec->owner, sec->contents + offset);
1908 BFD_ASSERT (value <= 0xffff || ((bfd_signed_vma) value) >= -0xffff);
1910 bfd_put_32 (sec->owner, word | ((value & 0xffff) << 6),
1911 sec->contents + offset);
1914 /* Install COUNT 32-bit values DATA starting at offset OFFSET into
1917 nios2_elf32_install_data (asection *sec, const bfd_vma *data, bfd_vma offset,
1922 bfd_put_32 (sec->owner, *data, sec->contents + offset);
1928 /* The usual way of loading a 32-bit constant into a Nios II register is to
1929 load the high 16 bits in one instruction and then add the low 16 bits with
1930 a signed add. This means that the high halfword needs to be adjusted to
1931 compensate for the sign bit of the low halfword. This function returns the
1932 adjusted high halfword for a given 32-bit constant. */
1934 bfd_vma hiadj (bfd_vma symbol_value)
1936 return ((symbol_value + 0x8000) >> 16) & 0xffff;
1939 /* Implement elf_backend_grok_prstatus:
1940 Support for core dump NOTE sections. */
1942 nios2_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1947 switch (note->descsz)
1952 case 212: /* Linux/Nios II */
1954 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
1957 elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24);
1966 /* Make a ".reg/999" section. */
1967 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1968 size, note->descpos + offset);
1971 /* Implement elf_backend_grok_psinfo. */
1973 nios2_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1975 switch (note->descsz)
1980 case 124: /* Linux/Nios II elf_prpsinfo */
1981 elf_tdata (abfd)->core->program
1982 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
1983 elf_tdata (abfd)->core->command
1984 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
1987 /* Note that for some reason, a spurious space is tacked
1988 onto the end of the args in some (at least one anyway)
1989 implementations, so strip it off if it exists. */
1992 char *command = elf_tdata (abfd)->core->command;
1993 int n = strlen (command);
1995 if (0 < n && command[n - 1] == ' ')
1996 command[n - 1] = '\0';
2002 /* Assorted hash table functions. */
2004 /* Initialize an entry in the stub hash table. */
2005 static struct bfd_hash_entry *
2006 stub_hash_newfunc (struct bfd_hash_entry *entry,
2007 struct bfd_hash_table *table,
2010 /* Allocate the structure if it has not already been allocated by a
2014 entry = bfd_hash_allocate (table,
2015 sizeof (struct elf32_nios2_stub_hash_entry));
2020 /* Call the allocation method of the superclass. */
2021 entry = bfd_hash_newfunc (entry, table, string);
2024 struct elf32_nios2_stub_hash_entry *hsh;
2026 /* Initialize the local fields. */
2027 hsh = (struct elf32_nios2_stub_hash_entry *) entry;
2028 hsh->stub_sec = NULL;
2029 hsh->stub_offset = 0;
2030 hsh->target_value = 0;
2031 hsh->target_section = NULL;
2032 hsh->stub_type = nios2_stub_none;
2040 /* Create an entry in a Nios II ELF linker hash table. */
2041 static struct bfd_hash_entry *
2042 link_hash_newfunc (struct bfd_hash_entry *entry,
2043 struct bfd_hash_table *table, const char *string)
2045 /* Allocate the structure if it has not already been allocated by a
2049 entry = bfd_hash_allocate (table,
2050 sizeof (struct elf32_nios2_link_hash_entry));
2055 /* Call the allocation method of the superclass. */
2056 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2059 struct elf32_nios2_link_hash_entry *eh;
2061 eh = (struct elf32_nios2_link_hash_entry *) entry;
2062 eh->hsh_cache = NULL;
2063 eh->dyn_relocs = NULL;
2064 eh->tls_type = GOT_UNKNOWN;
2065 eh->got_types_used = 0;
2071 /* Section name for stubs is the associated section name plus this
2073 #define STUB_SUFFIX ".stub"
2075 /* Build a name for an entry in the stub hash table. */
2077 nios2_stub_name (const asection *input_section,
2078 const asection *sym_sec,
2079 const struct elf32_nios2_link_hash_entry *hh,
2080 const Elf_Internal_Rela *rel,
2081 enum elf32_nios2_stub_type stub_type)
2085 char stubpos = (stub_type == nios2_stub_call26_before) ? 'b' : 'a';
2089 len = 8 + 1 + 1 + 1+ strlen (hh->root.root.root.string) + 1 + 8 + 1;
2090 stub_name = bfd_malloc (len);
2091 if (stub_name != NULL)
2093 sprintf (stub_name, "%08x_%c_%s+%x",
2094 input_section->id & 0xffffffff,
2096 hh->root.root.root.string,
2097 (int) rel->r_addend & 0xffffffff);
2102 len = 8 + 1 + 1 + 1+ 8 + 1 + 8 + 1 + 8 + 1;
2103 stub_name = bfd_malloc (len);
2104 if (stub_name != NULL)
2106 sprintf (stub_name, "%08x_%c_%x:%x+%x",
2107 input_section->id & 0xffffffff,
2109 sym_sec->id & 0xffffffff,
2110 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
2111 (int) rel->r_addend & 0xffffffff);
2117 /* Look up an entry in the stub hash. Stub entries are cached because
2118 creating the stub name takes a bit of time. */
2119 static struct elf32_nios2_stub_hash_entry *
2120 nios2_get_stub_entry (const asection *input_section,
2121 const asection *sym_sec,
2122 struct elf32_nios2_link_hash_entry *hh,
2123 const Elf_Internal_Rela *rel,
2124 struct elf32_nios2_link_hash_table *htab,
2125 enum elf32_nios2_stub_type stub_type)
2127 struct elf32_nios2_stub_hash_entry *hsh;
2128 const asection *id_sec;
2130 /* If this input section is part of a group of sections sharing one
2131 stub section, then use the id of the first/last section in the group,
2132 depending on the stub section placement relative to the group.
2133 Stub names need to include a section id, as there may well be
2134 more than one stub used to reach say, printf, and we need to
2135 distinguish between them. */
2136 if (stub_type == nios2_stub_call26_before)
2137 id_sec = htab->stub_group[input_section->id].first_sec;
2139 id_sec = htab->stub_group[input_section->id].last_sec;
2141 if (hh != NULL && hh->hsh_cache != NULL
2142 && hh->hsh_cache->hh == hh
2143 && hh->hsh_cache->id_sec == id_sec
2144 && hh->hsh_cache->stub_type == stub_type)
2146 hsh = hh->hsh_cache;
2152 stub_name = nios2_stub_name (id_sec, sym_sec, hh, rel, stub_type);
2153 if (stub_name == NULL)
2156 hsh = nios2_stub_hash_lookup (&htab->bstab,
2157 stub_name, FALSE, FALSE);
2160 hh->hsh_cache = hsh;
2168 /* Add a new stub entry to the stub hash. Not all fields of the new
2169 stub entry are initialised. */
2170 static struct elf32_nios2_stub_hash_entry *
2171 nios2_add_stub (const char *stub_name,
2173 struct elf32_nios2_link_hash_table *htab,
2174 enum elf32_nios2_stub_type stub_type)
2178 asection **secptr, **linkptr;
2179 struct elf32_nios2_stub_hash_entry *hsh;
2182 if (stub_type == nios2_stub_call26_before)
2184 link_sec = htab->stub_group[section->id].first_sec;
2185 secptr = &(htab->stub_group[section->id].first_stub_sec);
2186 linkptr = &(htab->stub_group[link_sec->id].first_stub_sec);
2191 link_sec = htab->stub_group[section->id].last_sec;
2192 secptr = &(htab->stub_group[section->id].last_stub_sec);
2193 linkptr = &(htab->stub_group[link_sec->id].last_stub_sec);
2197 if (stub_sec == NULL)
2199 stub_sec = *linkptr;
2200 if (stub_sec == NULL)
2206 namelen = strlen (link_sec->name);
2207 len = namelen + sizeof (STUB_SUFFIX);
2208 s_name = bfd_alloc (htab->stub_bfd, len);
2212 memcpy (s_name, link_sec->name, namelen);
2213 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2215 stub_sec = (*htab->add_stub_section) (s_name, link_sec, afterp);
2216 if (stub_sec == NULL)
2218 *linkptr = stub_sec;
2223 /* Enter this entry into the linker stub hash table. */
2224 hsh = nios2_stub_hash_lookup (&htab->bstab, stub_name,
2228 (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
2234 hsh->stub_sec = stub_sec;
2235 hsh->stub_offset = 0;
2236 hsh->id_sec = link_sec;
2240 /* Set up various things so that we can make a list of input sections
2241 for each output section included in the link. Returns -1 on error,
2242 0 when no stubs will be needed, and 1 on success. */
2244 nios2_elf32_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info)
2247 unsigned int bfd_count;
2248 unsigned int top_id, top_index;
2250 asection **input_list, **list;
2252 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2254 /* Count the number of input BFDs and find the top input section id. */
2255 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2257 input_bfd = input_bfd->link.next)
2260 for (section = input_bfd->sections;
2262 section = section->next)
2264 if (top_id < section->id)
2265 top_id = section->id;
2269 htab->bfd_count = bfd_count;
2271 amt = sizeof (struct map_stub) * (top_id + 1);
2272 htab->stub_group = bfd_zmalloc (amt);
2273 if (htab->stub_group == NULL)
2276 /* We can't use output_bfd->section_count here to find the top output
2277 section index as some sections may have been removed, and
2278 strip_excluded_output_sections doesn't renumber the indices. */
2279 for (section = output_bfd->sections, top_index = 0;
2281 section = section->next)
2283 if (top_index < section->index)
2284 top_index = section->index;
2287 htab->top_index = top_index;
2288 amt = sizeof (asection *) * (top_index + 1);
2289 input_list = bfd_malloc (amt);
2290 htab->input_list = input_list;
2291 if (input_list == NULL)
2294 /* For sections we aren't interested in, mark their entries with a
2295 value we can check later. */
2296 list = input_list + top_index;
2298 *list = bfd_abs_section_ptr;
2299 while (list-- != input_list);
2301 for (section = output_bfd->sections;
2303 section = section->next)
2305 /* FIXME: This is a bit of hack. Currently our .ctors and .dtors
2306 * have PC relative relocs in them but no code flag set. */
2307 if (((section->flags & SEC_CODE) != 0) ||
2308 strcmp(".ctors", section->name) ||
2309 strcmp(".dtors", section->name))
2310 input_list[section->index] = NULL;
2316 /* The linker repeatedly calls this function for each input section,
2317 in the order that input sections are linked into output sections.
2318 Build lists of input sections to determine groupings between which
2319 we may insert linker stubs. */
2321 nios2_elf32_next_input_section (struct bfd_link_info *info, asection *isec)
2323 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2325 if (isec->output_section->index <= htab->top_index)
2327 asection **list = htab->input_list + isec->output_section->index;
2328 if (*list != bfd_abs_section_ptr)
2330 /* Steal the last_sec pointer for our list.
2331 This happens to make the list in reverse order,
2332 which is what we want. */
2333 htab->stub_group[isec->id].last_sec = *list;
2339 /* Segment mask for CALL26 relocation relaxation. */
2340 #define CALL26_SEGMENT(x) ((x) & 0xf0000000)
2342 /* Fudge factor for approximate maximum size of all stubs that might
2343 be inserted by the linker. This does not actually limit the number
2344 of stubs that might be inserted, and only affects strategy for grouping
2345 and placement of stubs. Perhaps this should be computed based on number
2346 of relocations seen, or be specifiable on the command line. */
2347 #define MAX_STUB_SECTION_SIZE 0xffff
2349 /* See whether we can group stub sections together. Grouping stub
2350 sections may result in fewer stubs. More importantly, we need to
2351 put all .init* and .fini* stubs at the end of the .init or
2352 .fini output sections respectively, because glibc splits the
2353 _init and _fini functions into multiple parts. Putting a stub in
2354 the middle of a function is not a good idea.
2355 Rather than computing groups of a maximum fixed size, for Nios II
2356 CALL26 relaxation it makes more sense to compute the groups based on
2357 sections that fit within a 256MB address segment. Also do not allow
2358 a group to span more than one output section, since different output
2359 sections might correspond to different memory banks on a bare-metal
2362 group_sections (struct elf32_nios2_link_hash_table *htab)
2364 asection **list = htab->input_list + htab->top_index;
2367 /* The list is in reverse order so we'll search backwards looking
2368 for the first section that begins in the same memory segment,
2369 marking sections along the way to point at the tail for this
2371 asection *tail = *list;
2372 if (tail == bfd_abs_section_ptr)
2374 while (tail != NULL)
2376 bfd_vma start = tail->output_section->vma + tail->output_offset;
2377 bfd_vma end = start + tail->size;
2378 bfd_vma segment = CALL26_SEGMENT (end);
2381 if (segment != CALL26_SEGMENT (start)
2382 || segment != CALL26_SEGMENT (end + MAX_STUB_SECTION_SIZE))
2383 /* This section spans more than one memory segment, or is
2384 close enough to the end of the segment that adding stub
2385 sections before it might cause it to move so that it
2386 spans memory segments, or that stubs added at the end of
2387 this group might overflow into the next memory segment.
2388 Put it in a group by itself to localize the effects. */
2390 prev = htab->stub_group[tail->id].last_sec;
2391 htab->stub_group[tail->id].last_sec = tail;
2392 htab->stub_group[tail->id].first_sec = tail;
2395 /* Collect more sections for this group. */
2397 asection *curr, *first;
2398 for (curr = tail; ; curr = prev)
2400 prev = htab->stub_group[curr->id].last_sec;
2402 || tail->output_section != prev->output_section
2403 || (CALL26_SEGMENT (prev->output_section->vma
2404 + prev->output_offset)
2409 for (curr = tail; ; curr = prev)
2411 prev = htab->stub_group[curr->id].last_sec;
2412 htab->stub_group[curr->id].last_sec = tail;
2413 htab->stub_group[curr->id].first_sec = first;
2419 /* Reset tail for the next group. */
2423 while (list-- != htab->input_list);
2424 free (htab->input_list);
2427 /* Determine the type of stub needed, if any, for a call. */
2428 static enum elf32_nios2_stub_type
2429 nios2_type_of_stub (asection *input_sec,
2430 const Elf_Internal_Rela *rel,
2431 struct elf32_nios2_link_hash_entry *hh,
2432 struct elf32_nios2_link_hash_table *htab,
2433 bfd_vma destination,
2434 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2436 bfd_vma location, segment, start, end;
2437 asection *s0, *s1, *s;
2440 !(hh->root.root.type == bfd_link_hash_defined
2441 || hh->root.root.type == bfd_link_hash_defweak))
2442 return nios2_stub_none;
2444 /* Determine where the call point is. */
2445 location = (input_sec->output_section->vma
2446 + input_sec->output_offset + rel->r_offset);
2447 segment = CALL26_SEGMENT (location);
2449 /* Nios II CALL and JMPI instructions can transfer control to addresses
2450 within the same 256MB segment as the PC. */
2451 if (segment == CALL26_SEGMENT (destination))
2452 return nios2_stub_none;
2454 /* Find the start and end addresses of the stub group. Also account for
2455 any already-created stub sections for this group. Note that for stubs
2456 in the end section, only the first instruction of the last stub
2457 (12 bytes long) needs to be within range. */
2458 s0 = htab->stub_group[input_sec->id].first_sec;
2459 s = htab->stub_group[s0->id].first_stub_sec;
2460 if (s != NULL && s->size > 0)
2461 start = s->output_section->vma + s->output_offset;
2463 start = s0->output_section->vma + s0->output_offset;
2465 s1 = htab->stub_group[input_sec->id].last_sec;
2466 s = htab->stub_group[s1->id].last_stub_sec;
2467 if (s != NULL && s->size > 0)
2468 end = s->output_section->vma + s->output_offset + s->size - 8;
2470 end = s1->output_section->vma + s1->output_offset + s1->size;
2472 BFD_ASSERT (start < end);
2473 BFD_ASSERT (start <= location);
2474 BFD_ASSERT (location < end);
2476 /* Put stubs at the end of the group unless that is not a valid
2477 location and the beginning of the group is. It might be that
2478 neither the beginning nor end works if we have an input section
2479 so large that it spans multiple segment boundaries. In that
2480 case, punt; the end result will be a relocation overflow error no
2481 matter what we do here.
2483 Note that adding stubs pushes up the addresses of all subsequent
2484 sections, so that stubs allocated on one pass through the
2485 relaxation loop may not be valid on the next pass. (E.g., we may
2486 allocate a stub at the beginning of the section on one pass and
2487 find that the call site has been bumped into the next memory
2488 segment on the next pass.) The important thing to note is that
2489 we never try to reclaim the space allocated to such unused stubs,
2490 so code size and section addresses can only increase with each
2491 iteration. Accounting for the start and end addresses of the
2492 already-created stub sections ensures that when the algorithm
2493 converges, it converges accurately, with the entire appropriate
2494 stub section accessible from the call site and not just the
2495 address at the start or end of the stub group proper. */
2497 if (segment == CALL26_SEGMENT (end))
2498 return nios2_stub_call26_after;
2499 else if (segment == CALL26_SEGMENT (start))
2500 return nios2_stub_call26_before;
2502 /* Perhaps this should be a dedicated error code. */
2503 return nios2_stub_none;
2507 nios2_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2509 struct elf32_nios2_stub_hash_entry *hsh
2510 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2511 asection *stub_sec = hsh->stub_sec;
2514 /* Make a note of the offset within the stubs for this entry. */
2515 hsh->stub_offset = stub_sec->size;
2517 switch (hsh->stub_type)
2519 case nios2_stub_call26_before:
2520 case nios2_stub_call26_after:
2521 /* A call26 stub looks like:
2522 orhi at, %hiadj(dest)
2523 addi at, at, %lo(dest)
2525 Note that call/jmpi instructions can't be used in PIC code
2526 so there is no reason for the stub to be PIC, either. */
2527 sym_value = (hsh->target_value
2528 + hsh->target_section->output_offset
2529 + hsh->target_section->output_section->vma
2532 nios2_elf32_install_data (stub_sec, nios2_call26_stub_entry,
2533 hsh->stub_offset, 3);
2534 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset,
2536 nios2_elf32_install_imm16 (stub_sec, hsh->stub_offset + 4,
2537 (sym_value & 0xffff));
2538 stub_sec->size += 12;
2548 /* As above, but don't actually build the stub. Just bump offset so
2549 we know stub section sizes. */
2551 nios2_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED)
2553 struct elf32_nios2_stub_hash_entry *hsh
2554 = (struct elf32_nios2_stub_hash_entry *) gen_entry;
2556 switch (hsh->stub_type)
2558 case nios2_stub_call26_before:
2559 case nios2_stub_call26_after:
2560 hsh->stub_sec->size += 12;
2569 /* Read in all local syms for all input bfds.
2570 Returns -1 on error, 0 otherwise. */
2573 get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd,
2574 struct bfd_link_info *info)
2576 unsigned int bfd_indx;
2577 Elf_Internal_Sym *local_syms, **all_local_syms;
2578 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2580 /* We want to read in symbol extension records only once. To do this
2581 we need to read in the local symbols in parallel and save them for
2582 later use; so hold pointers to the local symbols in an array. */
2583 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
2584 all_local_syms = bfd_zmalloc (amt);
2585 htab->all_local_syms = all_local_syms;
2586 if (all_local_syms == NULL)
2589 /* Walk over all the input BFDs, swapping in local symbols. */
2592 input_bfd = input_bfd->link.next, bfd_indx++)
2594 Elf_Internal_Shdr *symtab_hdr;
2596 /* We'll need the symbol table in a second. */
2597 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2598 if (symtab_hdr->sh_info == 0)
2601 /* We need an array of the local symbols attached to the input bfd. */
2602 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
2603 if (local_syms == NULL)
2605 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2606 symtab_hdr->sh_info, 0,
2608 /* Cache them for elf_link_input_bfd. */
2609 symtab_hdr->contents = (unsigned char *) local_syms;
2611 if (local_syms == NULL)
2614 all_local_syms[bfd_indx] = local_syms;
2620 /* Determine and set the size of the stub section for a final link. */
2622 nios2_elf32_size_stubs (bfd *output_bfd, bfd *stub_bfd,
2623 struct bfd_link_info *info,
2624 asection *(*add_stub_section) (const char *,
2625 asection *, bfd_boolean),
2626 void (*layout_sections_again) (void))
2628 bfd_boolean stub_changed = FALSE;
2629 struct elf32_nios2_link_hash_table *htab = elf32_nios2_hash_table (info);
2631 /* Stash our params away. */
2632 htab->stub_bfd = stub_bfd;
2633 htab->add_stub_section = add_stub_section;
2634 htab->layout_sections_again = layout_sections_again;
2636 /* FIXME: We only compute the section groups once. This could cause
2637 problems if adding a large stub section causes following sections,
2638 or parts of them, to move into another segment. However, this seems
2639 to be consistent with the way other back ends handle this.... */
2640 group_sections (htab);
2642 if (get_local_syms (output_bfd, info->input_bfds, info))
2644 if (htab->all_local_syms)
2645 goto error_ret_free_local;
2652 unsigned int bfd_indx;
2655 for (input_bfd = info->input_bfds, bfd_indx = 0;
2657 input_bfd = input_bfd->link.next, bfd_indx++)
2659 Elf_Internal_Shdr *symtab_hdr;
2661 Elf_Internal_Sym *local_syms;
2663 /* We'll need the symbol table in a second. */
2664 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2665 if (symtab_hdr->sh_info == 0)
2668 local_syms = htab->all_local_syms[bfd_indx];
2670 /* Walk over each section attached to the input bfd. */
2671 for (section = input_bfd->sections;
2673 section = section->next)
2675 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2677 /* If there aren't any relocs, then there's nothing more
2679 if ((section->flags & SEC_RELOC) == 0
2680 || section->reloc_count == 0)
2683 /* If this section is a link-once section that will be
2684 discarded, then don't create any stubs. */
2685 if (section->output_section == NULL
2686 || section->output_section->owner != output_bfd)
2689 /* Get the relocs. */
2691 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL,
2693 if (internal_relocs == NULL)
2694 goto error_ret_free_local;
2696 /* Now examine each relocation. */
2697 irela = internal_relocs;
2698 irelaend = irela + section->reloc_count;
2699 for (; irela < irelaend; irela++)
2701 unsigned int r_type, r_indx;
2702 enum elf32_nios2_stub_type stub_type;
2703 struct elf32_nios2_stub_hash_entry *hsh;
2706 bfd_vma destination;
2707 struct elf32_nios2_link_hash_entry *hh;
2709 const asection *id_sec;
2711 r_type = ELF32_R_TYPE (irela->r_info);
2712 r_indx = ELF32_R_SYM (irela->r_info);
2714 if (r_type >= (unsigned int) R_NIOS2_ILLEGAL)
2716 bfd_set_error (bfd_error_bad_value);
2717 error_ret_free_internal:
2718 if (elf_section_data (section)->relocs == NULL)
2719 free (internal_relocs);
2720 goto error_ret_free_local;
2723 /* Only look for stubs on CALL and JMPI instructions. */
2724 if (r_type != (unsigned int) R_NIOS2_CALL26)
2727 /* Now determine the call target, its name, value,
2733 if (r_indx < symtab_hdr->sh_info)
2735 /* It's a local symbol. */
2736 Elf_Internal_Sym *sym;
2737 Elf_Internal_Shdr *hdr;
2740 sym = local_syms + r_indx;
2741 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2742 sym_value = sym->st_value;
2743 shndx = sym->st_shndx;
2744 if (shndx < elf_numsections (input_bfd))
2746 hdr = elf_elfsections (input_bfd)[shndx];
2747 sym_sec = hdr->bfd_section;
2748 destination = (sym_value + irela->r_addend
2749 + sym_sec->output_offset
2750 + sym_sec->output_section->vma);
2755 /* It's an external symbol. */
2758 e_indx = r_indx - symtab_hdr->sh_info;
2759 hh = ((struct elf32_nios2_link_hash_entry *)
2760 elf_sym_hashes (input_bfd)[e_indx]);
2762 while (hh->root.root.type == bfd_link_hash_indirect
2763 || hh->root.root.type == bfd_link_hash_warning)
2764 hh = ((struct elf32_nios2_link_hash_entry *)
2765 hh->root.root.u.i.link);
2767 if (hh->root.root.type == bfd_link_hash_defined
2768 || hh->root.root.type == bfd_link_hash_defweak)
2770 sym_sec = hh->root.root.u.def.section;
2771 sym_value = hh->root.root.u.def.value;
2773 if (sym_sec->output_section != NULL)
2774 destination = (sym_value + irela->r_addend
2775 + sym_sec->output_offset
2776 + sym_sec->output_section->vma);
2780 else if (hh->root.root.type == bfd_link_hash_undefweak)
2782 if (! bfd_link_pic (info))
2785 else if (hh->root.root.type == bfd_link_hash_undefined)
2787 if (! (info->unresolved_syms_in_objects == RM_IGNORE
2788 && (ELF_ST_VISIBILITY (hh->root.other)
2794 bfd_set_error (bfd_error_bad_value);
2795 goto error_ret_free_internal;
2799 /* Determine what (if any) linker stub is needed. */
2800 stub_type = nios2_type_of_stub (section, irela, hh, htab,
2802 if (stub_type == nios2_stub_none)
2805 /* Support for grouping stub sections. */
2806 if (stub_type == nios2_stub_call26_before)
2807 id_sec = htab->stub_group[section->id].first_sec;
2809 id_sec = htab->stub_group[section->id].last_sec;
2811 /* Get the name of this stub. */
2812 stub_name = nios2_stub_name (id_sec, sym_sec, hh, irela,
2815 goto error_ret_free_internal;
2817 hsh = nios2_stub_hash_lookup (&htab->bstab,
2822 /* The proper stub has already been created. */
2827 hsh = nios2_add_stub (stub_name, section, htab, stub_type);
2831 goto error_ret_free_internal;
2833 hsh->target_value = sym_value;
2834 hsh->target_section = sym_sec;
2835 hsh->stub_type = stub_type;
2837 hsh->addend = irela->r_addend;
2838 stub_changed = TRUE;
2841 /* We're done with the internal relocs, free them. */
2842 if (elf_section_data (section)->relocs == NULL)
2843 free (internal_relocs);
2850 /* OK, we've added some stubs. Find out the new size of the
2852 for (stub_sec = htab->stub_bfd->sections;
2854 stub_sec = stub_sec->next)
2857 bfd_hash_traverse (&htab->bstab, nios2_size_one_stub, htab);
2859 /* Ask the linker to do its stuff. */
2860 (*htab->layout_sections_again) ();
2861 stub_changed = FALSE;
2864 free (htab->all_local_syms);
2867 error_ret_free_local:
2868 free (htab->all_local_syms);
2872 /* Build all the stubs associated with the current output file. The
2873 stubs are kept in a hash table attached to the main linker hash
2874 table. This function is called via nios2elf_finish in the linker. */
2876 nios2_elf32_build_stubs (struct bfd_link_info *info)
2879 struct bfd_hash_table *table;
2880 struct elf32_nios2_link_hash_table *htab;
2882 htab = elf32_nios2_hash_table (info);
2884 for (stub_sec = htab->stub_bfd->sections;
2886 stub_sec = stub_sec->next)
2887 /* The stub_bfd may contain non-stub sections if it is also the
2888 dynobj. Any such non-stub sections are created with the
2889 SEC_LINKER_CREATED flag set, while stub sections do not
2890 have that flag. Ignore any non-stub sections here. */
2891 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0)
2895 /* Allocate memory to hold the linker stubs. */
2896 size = stub_sec->size;
2897 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
2898 if (stub_sec->contents == NULL && size != 0)
2903 /* Build the stubs as directed by the stub hash table. */
2904 table = &htab->bstab;
2905 bfd_hash_traverse (table, nios2_build_one_stub, info);
2911 #define is_nios2_elf(bfd) \
2912 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2913 && elf_object_id (bfd) == NIOS2_ELF_DATA)
2915 /* Merge backend specific data from an object file to the output
2916 object file when linking. */
2919 nios2_elf32_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
2924 if (!is_nios2_elf (ibfd) || !is_nios2_elf (obfd))
2927 /* Check if we have the same endianness. */
2928 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
2931 new_flags = elf_elfheader (ibfd)->e_flags;
2932 old_flags = elf_elfheader (obfd)->e_flags;
2933 if (!elf_flags_init (obfd))
2935 /* First call, no flags set. */
2936 elf_flags_init (obfd) = TRUE;
2937 elf_elfheader (obfd)->e_flags = new_flags;
2942 case EF_NIOS2_ARCH_R1:
2943 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r1);
2945 case EF_NIOS2_ARCH_R2:
2946 if (bfd_big_endian (ibfd))
2948 (*_bfd_error_handler)
2949 (_("error: %B: Big-endian R2 is not supported."), ibfd);
2950 bfd_set_error (bfd_error_bad_value);
2953 bfd_default_set_arch_mach (obfd, bfd_arch_nios2, bfd_mach_nios2r2);
2958 /* Incompatible flags. */
2959 else if (new_flags != old_flags)
2961 /* So far, the only incompatible flags denote incompatible
2963 (*_bfd_error_handler)
2964 (_("error: %B: Conflicting CPU architectures %d/%d"),
2965 ibfd, new_flags, old_flags);
2966 bfd_set_error (bfd_error_bad_value);
2970 /* Merge Tag_compatibility attributes and any common GNU ones. */
2971 _bfd_elf_merge_object_attributes (ibfd, obfd);
2977 /* Implement bfd_elf32_bfd_reloc_type_lookup:
2978 Given a BFD reloc type, return a howto structure. */
2979 static reloc_howto_type *
2980 nios2_elf32_bfd_reloc_type_lookup (bfd *abfd,
2981 bfd_reloc_code_real_type code)
2986 i < (int) (sizeof (nios2_reloc_map) / sizeof (struct elf_reloc_map));
2988 if (nios2_reloc_map[i].bfd_val == code)
2989 return lookup_howto (nios2_reloc_map[i].elf_val, abfd);
2993 /* Implement bfd_elf32_bfd_reloc_name_lookup:
2994 Given a reloc name, return a howto structure. */
2995 static reloc_howto_type *
2996 nios2_elf32_bfd_reloc_name_lookup (bfd *abfd,
3000 reloc_howto_type *howto_tbl;
3003 if (BFD_IS_R2 (abfd))
3005 howto_tbl = elf_nios2_r2_howto_table_rel;
3006 howto_tbl_size = (int) (sizeof (elf_nios2_r2_howto_table_rel)
3007 / sizeof (elf_nios2_r2_howto_table_rel[0]));
3011 howto_tbl = elf_nios2_r1_howto_table_rel;
3012 howto_tbl_size = (int) (sizeof (elf_nios2_r1_howto_table_rel)
3013 / sizeof (elf_nios2_r1_howto_table_rel[0]));
3016 for (i = 0; i < howto_tbl_size; i++)
3017 if (howto_tbl[i].name && strcasecmp (howto_tbl[i].name, r_name) == 0)
3018 return howto_tbl + i;
3022 /* Implement elf_info_to_howto:
3023 Given a ELF32 relocation, fill in a arelent structure. */
3025 nios2_elf32_info_to_howto (bfd *abfd, arelent *cache_ptr,
3026 Elf_Internal_Rela *dst)
3028 unsigned int r_type;
3030 r_type = ELF32_R_TYPE (dst->r_info);
3031 cache_ptr->howto = lookup_howto (r_type, abfd);
3034 /* Return the base VMA address which should be subtracted from real addresses
3035 when resolving @dtpoff relocation.
3036 This is PT_TLS segment p_vaddr. */
3038 dtpoff_base (struct bfd_link_info *info)
3040 /* If tls_sec is NULL, we should have signalled an error already. */
3041 if (elf_hash_table (info)->tls_sec == NULL)
3043 return elf_hash_table (info)->tls_sec->vma;
3046 /* Return the relocation value for @tpoff relocation
3047 if STT_TLS virtual address is ADDRESS. */
3049 tpoff (struct bfd_link_info *info, bfd_vma address)
3051 struct elf_link_hash_table *htab = elf_hash_table (info);
3053 /* If tls_sec is NULL, we should have signalled an error already. */
3054 if (htab->tls_sec == NULL)
3056 return address - htab->tls_sec->vma;
3059 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
3060 dangerous relocation. */
3062 nios2_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp, struct bfd_link_info *info)
3065 bfd_boolean gp_found;
3066 struct bfd_hash_entry *h;
3067 struct bfd_link_hash_entry *lh;
3069 /* If we've already figured out what GP will be, just return it. */
3070 *pgp = _bfd_get_gp_value (output_bfd);
3074 h = bfd_hash_lookup (&info->hash->table, "_gp", FALSE, FALSE);
3075 lh = (struct bfd_link_hash_entry *) h;
3081 case bfd_link_hash_undefined:
3082 case bfd_link_hash_undefweak:
3083 case bfd_link_hash_common:
3086 case bfd_link_hash_defined:
3087 case bfd_link_hash_defweak:
3090 asection *sym_sec = lh->u.def.section;
3091 bfd_vma sym_value = lh->u.def.value;
3093 if (sym_sec->output_section)
3094 sym_value = (sym_value + sym_sec->output_offset
3095 + sym_sec->output_section->vma);
3099 case bfd_link_hash_indirect:
3100 case bfd_link_hash_warning:
3102 /* @@FIXME ignoring warning for now */
3104 case bfd_link_hash_new:
3114 /* Only get the error once. */
3116 _bfd_set_gp_value (output_bfd, *pgp);
3120 _bfd_set_gp_value (output_bfd, *pgp);
3125 /* Retrieve the previously cached _gp pointer, returning bfd_reloc_dangerous
3126 if it's not available as we don't have a link_info pointer available here
3127 to look it up in the output symbol table. We don't need to adjust the
3128 symbol value for an external symbol if we are producing relocatable
3130 static bfd_reloc_status_type
3131 nios2_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
3132 char **error_message, bfd_vma *pgp)
3134 if (bfd_is_und_section (symbol->section) && !relocatable)
3137 return bfd_reloc_undefined;
3140 *pgp = _bfd_get_gp_value (output_bfd);
3141 if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
3145 /* Make up a value. */
3146 *pgp = symbol->section->output_section->vma + 0x4000;
3147 _bfd_set_gp_value (output_bfd, *pgp);
3152 = (char *) _("global pointer relative relocation when _gp not defined");
3153 return bfd_reloc_dangerous;
3157 return bfd_reloc_ok;
3160 /* Do the relocations that require special handling. */
3161 static bfd_reloc_status_type
3162 nios2_elf32_do_hi16_relocate (bfd *abfd, reloc_howto_type *howto,
3163 asection *input_section,
3164 bfd_byte *data, bfd_vma offset,
3165 bfd_vma symbol_value, bfd_vma addend)
3167 symbol_value = symbol_value + addend;
3169 symbol_value = (symbol_value >> 16) & 0xffff;
3170 return _bfd_final_link_relocate (howto, abfd, input_section,
3171 data, offset, symbol_value, addend);
3174 static bfd_reloc_status_type
3175 nios2_elf32_do_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
3176 asection *input_section,
3177 bfd_byte *data, bfd_vma offset,
3178 bfd_vma symbol_value, bfd_vma addend)
3180 symbol_value = symbol_value + addend;
3182 symbol_value = symbol_value & 0xffff;
3183 return _bfd_final_link_relocate (howto, abfd, input_section,
3184 data, offset, symbol_value, addend);
3187 static bfd_reloc_status_type
3188 nios2_elf32_do_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
3189 asection *input_section,
3190 bfd_byte *data, bfd_vma offset,
3191 bfd_vma symbol_value, bfd_vma addend)
3193 symbol_value = symbol_value + addend;
3195 symbol_value = hiadj(symbol_value);
3196 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3197 symbol_value, addend);
3200 static bfd_reloc_status_type
3201 nios2_elf32_do_pcrel_lo16_relocate (bfd *abfd, reloc_howto_type *howto,
3202 asection *input_section,
3203 bfd_byte *data, bfd_vma offset,
3204 bfd_vma symbol_value, bfd_vma addend)
3206 symbol_value = symbol_value + addend;
3208 symbol_value = symbol_value & 0xffff;
3209 return _bfd_final_link_relocate (howto, abfd, input_section,
3210 data, offset, symbol_value, addend);
3213 static bfd_reloc_status_type
3214 nios2_elf32_do_pcrel_hiadj16_relocate (bfd *abfd, reloc_howto_type *howto,
3215 asection *input_section,
3216 bfd_byte *data, bfd_vma offset,
3217 bfd_vma symbol_value, bfd_vma addend)
3219 symbol_value = symbol_value + addend;
3220 symbol_value -= (input_section->output_section->vma
3221 + input_section->output_offset);
3222 symbol_value -= offset;
3224 symbol_value = hiadj(symbol_value);
3225 return _bfd_final_link_relocate (howto, abfd, input_section, data, offset,
3226 symbol_value, addend);
3229 static bfd_reloc_status_type
3230 nios2_elf32_do_pcrel16_relocate (bfd *abfd, reloc_howto_type *howto,
3231 asection *input_section,
3232 bfd_byte *data, bfd_vma offset,
3233 bfd_vma symbol_value, bfd_vma addend)
3235 /* NIOS2 pc relative relocations are relative to the next 32-bit instruction
3236 so we need to subtract 4 before doing a final_link_relocate. */
3237 symbol_value = symbol_value + addend - 4;
3239 return _bfd_final_link_relocate (howto, abfd, input_section,
3240 data, offset, symbol_value, addend);
3243 static bfd_reloc_status_type
3244 nios2_elf32_do_call26_relocate (bfd *abfd, reloc_howto_type *howto,
3245 asection *input_section,
3246 bfd_byte *data, bfd_vma offset,
3247 bfd_vma symbol_value, bfd_vma addend)
3249 /* Check that the relocation is in the same page as the current address. */
3250 if (CALL26_SEGMENT (symbol_value + addend)
3251 != CALL26_SEGMENT (input_section->output_section->vma
3252 + input_section->output_offset
3254 return bfd_reloc_overflow;
3256 /* Check that the target address is correctly aligned on a 4-byte
3258 if ((symbol_value + addend) & 0x3)
3259 return bfd_reloc_overflow;
3261 return _bfd_final_link_relocate (howto, abfd, input_section,
3262 data, offset, symbol_value, addend);
3265 static bfd_reloc_status_type
3266 nios2_elf32_do_gprel_relocate (bfd *abfd, reloc_howto_type *howto,
3267 asection *input_section,
3268 bfd_byte *data, bfd_vma offset,
3269 bfd_vma symbol_value, bfd_vma addend)
3271 /* Because we need the output_bfd, the special handling is done
3272 in nios2_elf32_relocate_section or in nios2_elf32_gprel_relocate. */
3273 return _bfd_final_link_relocate (howto, abfd, input_section,
3274 data, offset, symbol_value, addend);
3277 static bfd_reloc_status_type
3278 nios2_elf32_do_ujmp_relocate (bfd *abfd, reloc_howto_type *howto,
3279 asection *input_section,
3280 bfd_byte *data, bfd_vma offset,
3281 bfd_vma symbol_value, bfd_vma addend)
3283 bfd_vma symbol_lo16, symbol_hi16;
3284 bfd_reloc_status_type r;
3285 symbol_value = symbol_value + addend;
3287 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3288 symbol_lo16 = symbol_value & 0xffff;
3290 r = _bfd_final_link_relocate (howto, abfd, input_section,
3291 data, offset, symbol_hi16, addend);
3293 if (r == bfd_reloc_ok)
3294 return _bfd_final_link_relocate (howto, abfd, input_section,
3295 data, offset + 4, symbol_lo16, addend);
3300 static bfd_reloc_status_type
3301 nios2_elf32_do_cjmp_relocate (bfd *abfd, reloc_howto_type *howto,
3302 asection *input_section,
3303 bfd_byte *data, bfd_vma offset,
3304 bfd_vma symbol_value, bfd_vma addend)
3306 bfd_vma symbol_lo16, symbol_hi16;
3307 bfd_reloc_status_type r;
3308 symbol_value = symbol_value + addend;
3310 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3311 symbol_lo16 = symbol_value & 0xffff;
3313 r = _bfd_final_link_relocate (howto, abfd, input_section,
3314 data, offset, symbol_hi16, addend);
3316 if (r == bfd_reloc_ok)
3317 return _bfd_final_link_relocate (howto, abfd, input_section,
3318 data, offset + 4, symbol_lo16, addend);
3323 static bfd_reloc_status_type
3324 nios2_elf32_do_callr_relocate (bfd *abfd, reloc_howto_type *howto,
3325 asection *input_section,
3326 bfd_byte *data, bfd_vma offset,
3327 bfd_vma symbol_value, bfd_vma addend)
3329 bfd_vma symbol_lo16, symbol_hi16;
3330 bfd_reloc_status_type r;
3331 symbol_value = symbol_value + addend;
3333 symbol_hi16 = (symbol_value >> 16) & 0xffff;
3334 symbol_lo16 = symbol_value & 0xffff;
3336 r = _bfd_final_link_relocate (howto, abfd, input_section,
3337 data, offset, symbol_hi16, addend);
3339 if (r == bfd_reloc_ok)
3340 return _bfd_final_link_relocate (howto, abfd, input_section,
3341 data, offset + 4, symbol_lo16, addend);
3346 /* HOWTO handlers for relocations that require special handling. */
3348 /* This is for relocations used only when relaxing to ensure
3349 changes in size of section don't screw up .align. */
3350 static bfd_reloc_status_type
3351 nios2_elf32_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
3352 asymbol *symbol ATTRIBUTE_UNUSED,
3353 void *data ATTRIBUTE_UNUSED, asection *input_section,
3355 char **error_message ATTRIBUTE_UNUSED)
3357 if (output_bfd != NULL)
3358 reloc_entry->address += input_section->output_offset;
3359 return bfd_reloc_ok;
3362 static bfd_reloc_status_type
3363 nios2_elf32_hi16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3364 void *data, asection *input_section,
3366 char **error_message ATTRIBUTE_UNUSED)
3368 /* This part is from bfd_elf_generic_reloc. */
3369 if (output_bfd != NULL
3370 && (symbol->flags & BSF_SECTION_SYM) == 0
3371 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3373 reloc_entry->address += input_section->output_offset;
3374 return bfd_reloc_ok;
3377 if (output_bfd != NULL)
3378 /* FIXME: See bfd_perform_relocation. Is this right? */
3379 return bfd_reloc_continue;
3381 return nios2_elf32_do_hi16_relocate (abfd, reloc_entry->howto,
3383 data, reloc_entry->address,
3385 + symbol->section->output_section->vma
3386 + symbol->section->output_offset),
3387 reloc_entry->addend);
3390 static bfd_reloc_status_type
3391 nios2_elf32_lo16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3392 void *data, asection *input_section,
3394 char **error_message ATTRIBUTE_UNUSED)
3396 /* This part is from bfd_elf_generic_reloc. */
3397 if (output_bfd != NULL
3398 && (symbol->flags & BSF_SECTION_SYM) == 0
3399 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3401 reloc_entry->address += input_section->output_offset;
3402 return bfd_reloc_ok;
3405 if (output_bfd != NULL)
3406 /* FIXME: See bfd_perform_relocation. Is this right? */
3407 return bfd_reloc_continue;
3409 return nios2_elf32_do_lo16_relocate (abfd, reloc_entry->howto,
3411 data, reloc_entry->address,
3413 + symbol->section->output_section->vma
3414 + symbol->section->output_offset),
3415 reloc_entry->addend);
3418 static bfd_reloc_status_type
3419 nios2_elf32_hiadj16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3420 void *data, asection *input_section,
3422 char **error_message ATTRIBUTE_UNUSED)
3424 /* This part is from bfd_elf_generic_reloc. */
3425 if (output_bfd != NULL
3426 && (symbol->flags & BSF_SECTION_SYM) == 0
3427 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3429 reloc_entry->address += input_section->output_offset;
3430 return bfd_reloc_ok;
3433 if (output_bfd != NULL)
3434 /* FIXME: See bfd_perform_relocation. Is this right? */
3435 return bfd_reloc_continue;
3437 return nios2_elf32_do_hiadj16_relocate (abfd, reloc_entry->howto,
3439 data, reloc_entry->address,
3441 + symbol->section->output_section->vma
3442 + symbol->section->output_offset),
3443 reloc_entry->addend);
3446 static bfd_reloc_status_type
3447 nios2_elf32_pcrel_lo16_relocate (bfd *abfd, arelent *reloc_entry,
3448 asymbol *symbol, void *data,
3449 asection *input_section, bfd *output_bfd,
3450 char **error_message ATTRIBUTE_UNUSED)
3452 /* This part is from bfd_elf_generic_reloc. */
3453 if (output_bfd != NULL
3454 && (symbol->flags & BSF_SECTION_SYM) == 0
3455 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3457 reloc_entry->address += input_section->output_offset;
3458 return bfd_reloc_ok;
3461 if (output_bfd != NULL)
3462 /* FIXME: See bfd_perform_relocation. Is this right? */
3463 return bfd_reloc_continue;
3465 return nios2_elf32_do_pcrel_lo16_relocate (
3466 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3467 (symbol->value + symbol->section->output_section->vma
3468 + symbol->section->output_offset),
3469 reloc_entry->addend);
3472 static bfd_reloc_status_type
3473 nios2_elf32_pcrel_hiadj16_relocate (bfd *abfd, arelent *reloc_entry,
3474 asymbol *symbol, void *data,
3475 asection *input_section, bfd *output_bfd,
3476 char **error_message ATTRIBUTE_UNUSED)
3478 /* This part is from bfd_elf_generic_reloc. */
3479 if (output_bfd != NULL
3480 && (symbol->flags & BSF_SECTION_SYM) == 0
3481 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3483 reloc_entry->address += input_section->output_offset;
3484 return bfd_reloc_ok;
3487 if (output_bfd != NULL)
3488 /* FIXME: See bfd_perform_relocation. Is this right? */
3489 return bfd_reloc_continue;
3491 return nios2_elf32_do_pcrel_hiadj16_relocate (
3492 abfd, reloc_entry->howto, input_section, data, reloc_entry->address,
3493 (symbol->value + symbol->section->output_section->vma
3494 + symbol->section->output_offset),
3495 reloc_entry->addend);
3498 static bfd_reloc_status_type
3499 nios2_elf32_pcrel16_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3500 void *data, asection *input_section,
3502 char **error_message ATTRIBUTE_UNUSED)
3504 /* This part is from bfd_elf_generic_reloc. */
3505 if (output_bfd != NULL
3506 && (symbol->flags & BSF_SECTION_SYM) == 0
3507 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3509 reloc_entry->address += input_section->output_offset;
3510 return bfd_reloc_ok;
3513 if (output_bfd != NULL)
3514 /* FIXME: See bfd_perform_relocation. Is this right? */
3515 return bfd_reloc_continue;
3517 return nios2_elf32_do_pcrel16_relocate (abfd, reloc_entry->howto,
3519 data, reloc_entry->address,
3521 + symbol->section->output_section->vma
3522 + symbol->section->output_offset),
3523 reloc_entry->addend);
3526 static bfd_reloc_status_type
3527 nios2_elf32_call26_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3528 void *data, asection *input_section,
3530 char **error_message ATTRIBUTE_UNUSED)
3532 /* This part is from bfd_elf_generic_reloc. */
3533 if (output_bfd != NULL
3534 && (symbol->flags & BSF_SECTION_SYM) == 0
3535 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3537 reloc_entry->address += input_section->output_offset;
3538 return bfd_reloc_ok;
3541 if (output_bfd != NULL)
3542 /* FIXME: See bfd_perform_relocation. Is this right? */
3543 return bfd_reloc_continue;
3545 return nios2_elf32_do_call26_relocate (abfd, reloc_entry->howto,
3547 data, reloc_entry->address,
3549 + symbol->section->output_section->vma
3550 + symbol->section->output_offset),
3551 reloc_entry->addend);
3554 static bfd_reloc_status_type
3555 nios2_elf32_gprel_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3556 void *data, asection *input_section,
3557 bfd *output_bfd, char **msg)
3561 bfd_reloc_status_type r;
3564 /* This part is from bfd_elf_generic_reloc. */
3565 if (output_bfd != NULL
3566 && (symbol->flags & BSF_SECTION_SYM) == 0
3567 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3569 reloc_entry->address += input_section->output_offset;
3570 return bfd_reloc_ok;
3573 if (output_bfd != NULL)
3574 /* FIXME: See bfd_perform_relocation. Is this right? */
3575 return bfd_reloc_continue;
3577 relocation = (symbol->value
3578 + symbol->section->output_section->vma
3579 + symbol->section->output_offset);
3581 /* This assumes we've already cached the _gp symbol. */
3582 r = nios2_elf_final_gp (abfd, symbol, FALSE, msg, &gp);
3583 if (r == bfd_reloc_ok)
3585 relocation = relocation + reloc_entry->addend - gp;
3586 reloc_entry->addend = 0;
3587 if ((signed) relocation < -32768 || (signed) relocation > 32767)
3589 *msg = _("global pointer relative address out of range");
3590 r = bfd_reloc_outofrange;
3593 r = nios2_elf32_do_gprel_relocate (abfd, reloc_entry->howto,
3595 data, reloc_entry->address,
3596 relocation, reloc_entry->addend);
3602 static bfd_reloc_status_type
3603 nios2_elf32_ujmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3604 void *data, asection *input_section,
3605 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3607 /* This part is from bfd_elf_generic_reloc. */
3608 if (output_bfd != NULL
3609 && (symbol->flags & BSF_SECTION_SYM) == 0
3610 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3612 reloc_entry->address += input_section->output_offset;
3613 return bfd_reloc_ok;
3616 if (output_bfd != NULL)
3617 /* FIXME: See bfd_perform_relocation. Is this right? */
3618 return bfd_reloc_continue;
3620 return nios2_elf32_do_ujmp_relocate (abfd, reloc_entry->howto,
3622 data, reloc_entry->address,
3624 + symbol->section->output_section->vma
3625 + symbol->section->output_offset),
3626 reloc_entry->addend);
3629 static bfd_reloc_status_type
3630 nios2_elf32_cjmp_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3631 void *data, asection *input_section,
3632 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3634 /* This part is from bfd_elf_generic_reloc. */
3635 if (output_bfd != NULL
3636 && (symbol->flags & BSF_SECTION_SYM) == 0
3637 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3639 reloc_entry->address += input_section->output_offset;
3640 return bfd_reloc_ok;
3643 if (output_bfd != NULL)
3644 /* FIXME: See bfd_perform_relocation. Is this right? */
3645 return bfd_reloc_continue;
3647 return nios2_elf32_do_cjmp_relocate (abfd, reloc_entry->howto,
3649 data, reloc_entry->address,
3651 + symbol->section->output_section->vma
3652 + symbol->section->output_offset),
3653 reloc_entry->addend);
3656 static bfd_reloc_status_type
3657 nios2_elf32_callr_relocate (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
3658 void *data, asection *input_section,
3659 bfd *output_bfd, char **msg ATTRIBUTE_UNUSED)
3661 /* This part is from bfd_elf_generic_reloc. */
3662 if (output_bfd != NULL
3663 && (symbol->flags & BSF_SECTION_SYM) == 0
3664 && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
3666 reloc_entry->address += input_section->output_offset;
3667 return bfd_reloc_ok;
3670 if (output_bfd != NULL)
3671 /* FIXME: See bfd_perform_relocation. Is this right? */
3672 return bfd_reloc_continue;
3674 return nios2_elf32_do_callr_relocate (abfd, reloc_entry->howto,
3676 data, reloc_entry->address,
3678 + symbol->section->output_section->vma
3679 + symbol->section->output_offset),
3680 reloc_entry->addend);
3684 /* Implement elf_backend_relocate_section. */
3686 nios2_elf32_relocate_section (bfd *output_bfd,
3687 struct bfd_link_info *info,
3689 asection *input_section,
3691 Elf_Internal_Rela *relocs,
3692 Elf_Internal_Sym *local_syms,
3693 asection **local_sections)
3695 Elf_Internal_Shdr *symtab_hdr;
3696 struct elf_link_hash_entry **sym_hashes;
3697 Elf_Internal_Rela *rel;
3698 Elf_Internal_Rela *relend;
3699 struct elf32_nios2_link_hash_table *htab;
3702 asection *sreloc = NULL;
3703 bfd_vma *local_got_offsets;
3706 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3707 sym_hashes = elf_sym_hashes (input_bfd);
3708 relend = relocs + input_section->reloc_count;
3710 htab = elf32_nios2_hash_table (info);
3711 sgot = htab->root.sgot;
3712 splt = htab->root.splt;
3713 local_got_offsets = elf_local_got_offsets (input_bfd);
3715 if (elf32_nios2_hash_table (info)->h_gp_got == NULL)
3718 got_base = elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value;
3720 for (rel = relocs; rel < relend; rel++)
3722 reloc_howto_type *howto;
3723 unsigned long r_symndx;
3724 Elf_Internal_Sym *sym;
3726 struct elf_link_hash_entry *h;
3727 struct elf32_nios2_link_hash_entry *eh;
3730 bfd_reloc_status_type r = bfd_reloc_ok;
3731 const char *name = NULL;
3735 const char* msg = (const char*) NULL;
3736 bfd_boolean unresolved_reloc;
3740 r_type = ELF32_R_TYPE (rel->r_info);
3741 r_symndx = ELF32_R_SYM (rel->r_info);
3743 howto = lookup_howto ((unsigned) ELF32_R_TYPE (rel->r_info), output_bfd);
3748 if (r_symndx < symtab_hdr->sh_info)
3750 sym = local_syms + r_symndx;
3751 sec = local_sections[r_symndx];
3752 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3756 bfd_boolean warned, ignored;
3758 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3759 r_symndx, symtab_hdr, sym_hashes,
3761 unresolved_reloc, warned, ignored);
3764 if (sec && discarded_section (sec))
3765 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3766 rel, 1, relend, howto, 0, contents);
3768 /* Nothing more to do unless this is a final link. */
3769 if (bfd_link_relocatable (info))
3774 switch (howto->type)
3777 r = nios2_elf32_do_hi16_relocate (input_bfd, howto,
3779 contents, rel->r_offset,
3780 relocation, rel->r_addend);
3783 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
3785 contents, rel->r_offset,
3786 relocation, rel->r_addend);
3788 case R_NIOS2_PCREL_LO:
3789 r = nios2_elf32_do_pcrel_lo16_relocate (input_bfd, howto,
3796 case R_NIOS2_HIADJ16:
3797 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
3798 input_section, contents,
3799 rel->r_offset, relocation,
3802 case R_NIOS2_PCREL_HA:
3803 r = nios2_elf32_do_pcrel_hiadj16_relocate (input_bfd, howto,
3810 case R_NIOS2_PCREL16:
3811 r = nios2_elf32_do_pcrel16_relocate (input_bfd, howto,
3812 input_section, contents,
3813 rel->r_offset, relocation,
3817 /* Turns an absolute address into a gp-relative address. */
3818 if (!nios2_elf_assign_gp (output_bfd, &gp, info))
3820 bfd_vma reloc_address;
3822 if (sec && sec->output_section)
3823 reloc_address = (sec->output_section->vma
3824 + sec->output_offset
3829 format = _("global pointer relative relocation at address "
3830 "0x%08x when _gp not defined\n");
3831 sprintf (msgbuf, format, reloc_address);
3833 r = bfd_reloc_dangerous;
3837 bfd_vma symbol_address = rel->r_addend + relocation;
3838 relocation = symbol_address - gp;
3840 if (((signed) relocation < -32768
3841 || (signed) relocation > 32767)
3843 || h->root.type == bfd_link_hash_defined
3844 || h->root.type == bfd_link_hash_defweak))
3847 name = h->root.root.string;
3848 format = _("Unable to reach %s (at 0x%08x) from the "
3849 "global pointer (at 0x%08x) because the "
3850 "offset (%d) is out of the allowed range, "
3851 "-32678 to 32767.\n" );
3852 sprintf (msgbuf, format, name, symbol_address, gp,
3853 (signed)relocation);
3855 r = bfd_reloc_outofrange;
3858 r = _bfd_final_link_relocate (howto, input_bfd,
3859 input_section, contents,
3860 rel->r_offset, relocation,
3865 r = nios2_elf32_do_ujmp_relocate (input_bfd, howto,
3867 contents, rel->r_offset,
3868 relocation, rel->r_addend);
3871 r = nios2_elf32_do_cjmp_relocate (input_bfd, howto,
3873 contents, rel->r_offset,
3874 relocation, rel->r_addend);
3877 r = nios2_elf32_do_callr_relocate (input_bfd, howto,
3878 input_section, contents,
3879 rel->r_offset, relocation,
3882 case R_NIOS2_CALL26:
3883 case R_NIOS2_CALL26_NOAT:
3884 /* If we have a call to an undefined weak symbol, we just want
3885 to stuff a zero in the bits of the call instruction and
3886 bypass the normal call26 relocation handling, because it'll
3887 diagnose an overflow error if address 0 isn't in the same
3888 256MB segment as the call site. Presumably the call
3889 should be guarded by a null check anyway. */
3890 if (h != NULL && h->root.type == bfd_link_hash_undefweak)
3892 BFD_ASSERT (relocation == 0 && rel->r_addend == 0);
3893 r = _bfd_final_link_relocate (howto, input_bfd,
3894 input_section, contents,
3895 rel->r_offset, relocation,
3899 /* Handle relocations which should use the PLT entry.
3900 NIOS2_BFD_RELOC_32 relocations will use the symbol's value,
3901 which may point to a PLT entry, but we don't need to handle
3902 that here. If we created a PLT entry, all branches in this
3903 object should go to it. */
3904 if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1)
3906 /* If we've created a .plt section, and assigned a PLT entry
3907 to this function, it should not be known to bind locally.
3908 If it were, we would have cleared the PLT entry. */
3909 BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
3911 relocation = (splt->output_section->vma
3912 + splt->output_offset
3915 unresolved_reloc = FALSE;
3917 /* Detect R_NIOS2_CALL26 relocations that would overflow the
3918 256MB segment. Replace the target with a reference to a
3920 Note that htab->stub_group is null if relaxation has been
3921 disabled by the --no-relax linker command-line option, so
3922 we can use that to skip this processing entirely. */
3923 if (howto->type == R_NIOS2_CALL26 && htab->stub_group)
3925 bfd_vma dest = relocation + rel->r_addend;
3926 enum elf32_nios2_stub_type stub_type;
3928 eh = (struct elf32_nios2_link_hash_entry *)h;
3929 stub_type = nios2_type_of_stub (input_section, rel, eh,
3932 if (stub_type != nios2_stub_none)
3934 struct elf32_nios2_stub_hash_entry *hsh;
3936 hsh = nios2_get_stub_entry (input_section, sec,
3937 eh, rel, htab, stub_type);
3940 r = bfd_reloc_undefined;
3944 dest = (hsh->stub_offset
3945 + hsh->stub_sec->output_offset
3946 + hsh->stub_sec->output_section->vma);
3947 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3957 r = nios2_elf32_do_call26_relocate (input_bfd, howto,
3958 input_section, contents,
3959 rel->r_offset, relocation,
3964 /* For symmetry this would be
3965 r = nios2_elf32_do_ignore_reloc (input_bfd, howto,
3966 input_section, contents,
3967 rel->r_offset, relocation,
3969 but do_ignore_reloc would do no more than return
3974 case R_NIOS2_CALL16:
3975 case R_NIOS2_GOT_LO:
3976 case R_NIOS2_GOT_HA:
3977 case R_NIOS2_CALL_LO:
3978 case R_NIOS2_CALL_HA:
3979 /* Relocation is to the entry for this symbol in the
3980 global offset table. */
3983 r = bfd_reloc_notsupported;
3993 eh = (struct elf32_nios2_link_hash_entry *)h;
3994 use_plt = (eh->got_types_used == CALL_USED
3995 && h->plt.offset != (bfd_vma) -1);
3997 off = h->got.offset;
3998 BFD_ASSERT (off != (bfd_vma) -1);
3999 dyn = elf_hash_table (info)->dynamic_sections_created;
4000 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4001 bfd_link_pic (info),
4003 || (bfd_link_pic (info)
4004 && SYMBOL_REFERENCES_LOCAL (info, h))
4005 || (ELF_ST_VISIBILITY (h->other)
4006 && h->root.type == bfd_link_hash_undefweak))
4008 /* This is actually a static link, or it is a -Bsymbolic
4009 link and the symbol is defined locally. We must
4010 initialize this entry in the global offset table.
4011 Since the offset must always be a multiple of 4, we
4012 use the least significant bit to record whether we
4013 have initialized it already.
4015 When doing a dynamic link, we create a .rela.got
4016 relocation entry to initialize the value. This is
4017 done in the finish_dynamic_symbol routine. */
4022 bfd_put_32 (output_bfd, relocation,
4023 sgot->contents + off);
4028 unresolved_reloc = FALSE;
4032 BFD_ASSERT (local_got_offsets != NULL
4033 && local_got_offsets[r_symndx] != (bfd_vma) -1);
4035 off = local_got_offsets[r_symndx];
4037 /* The offset must always be a multiple of 4. We use the
4038 least significant bit to record whether we have already
4039 generated the necessary reloc. */
4044 bfd_put_32 (output_bfd, relocation,
4045 sgot->contents + off);
4047 if (bfd_link_pic (info))
4050 Elf_Internal_Rela outrel;
4053 srelgot = htab->root.srelgot;
4054 BFD_ASSERT (srelgot != NULL);
4056 outrel.r_addend = relocation;
4057 outrel.r_offset = (sgot->output_section->vma
4058 + sgot->output_offset
4060 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4061 loc = srelgot->contents;
4062 loc += (srelgot->reloc_count++ *
4063 sizeof (Elf32_External_Rela));
4064 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4067 local_got_offsets[r_symndx] |= 1;
4071 if (use_plt && bfd_link_pic (info))
4073 off = ((h->plt.offset - 24) / 12 + 3) * 4;
4074 relocation = (htab->root.sgotplt->output_offset + off
4078 relocation = sgot->output_offset + off - got_base;
4080 /* This relocation does not use the addend. */
4083 switch (howto->type)
4085 case R_NIOS2_GOT_LO:
4086 case R_NIOS2_CALL_LO:
4087 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4088 input_section, contents,
4089 rel->r_offset, relocation,
4092 case R_NIOS2_GOT_HA:
4093 case R_NIOS2_CALL_HA:
4094 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4095 input_section, contents,
4101 r = _bfd_final_link_relocate (howto, input_bfd,
4102 input_section, contents,
4103 rel->r_offset, relocation,
4109 case R_NIOS2_GOTOFF_LO:
4110 case R_NIOS2_GOTOFF_HA:
4111 case R_NIOS2_GOTOFF:
4112 /* Relocation is relative to the global offset table pointer. */
4114 BFD_ASSERT (sgot != NULL);
4117 r = bfd_reloc_notsupported;
4121 /* Note that sgot->output_offset is not involved in this
4122 calculation. We always want the start of .got. */
4123 relocation -= sgot->output_section->vma;
4125 /* Now we adjust the relocation to be relative to the GOT pointer
4126 (the _gp_got symbol), which possibly contains the 0x8000 bias. */
4127 relocation -= got_base;
4129 switch (howto->type)
4131 case R_NIOS2_GOTOFF_LO:
4132 r = nios2_elf32_do_lo16_relocate (input_bfd, howto,
4133 input_section, contents,
4134 rel->r_offset, relocation,
4137 case R_NIOS2_GOTOFF_HA:
4138 r = nios2_elf32_do_hiadj16_relocate (input_bfd, howto,
4139 input_section, contents,
4145 r = _bfd_final_link_relocate (howto, input_bfd,
4146 input_section, contents,
4147 rel->r_offset, relocation,
4153 case R_NIOS2_TLS_LDO16:
4154 relocation -= dtpoff_base (info) + DTP_OFFSET;
4156 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4157 contents, rel->r_offset,
4158 relocation, rel->r_addend);
4160 case R_NIOS2_TLS_LDM16:
4161 if (htab->root.sgot == NULL)
4164 off = htab->tls_ldm_got.offset;
4170 /* If we don't know the module number, create a relocation
4172 if (bfd_link_pic (info))
4174 Elf_Internal_Rela outrel;
4177 if (htab->root.srelgot == NULL)
4180 outrel.r_addend = 0;
4181 outrel.r_offset = (htab->root.sgot->output_section->vma
4182 + htab->root.sgot->output_offset
4184 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_TLS_DTPMOD);
4186 loc = htab->root.srelgot->contents;
4187 loc += (htab->root.srelgot->reloc_count++
4188 * sizeof (Elf32_External_Rela));
4189 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4192 bfd_put_32 (output_bfd, 1,
4193 htab->root.sgot->contents + off);
4195 htab->tls_ldm_got.offset |= 1;
4198 relocation = htab->root.sgot->output_offset + off - got_base;
4200 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4201 contents, rel->r_offset,
4202 relocation, rel->r_addend);
4205 case R_NIOS2_TLS_GD16:
4206 case R_NIOS2_TLS_IE16:
4211 if (htab->root.sgot == NULL)
4218 dyn = htab->root.dynamic_sections_created;
4219 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4220 bfd_link_pic (info),
4222 && (!bfd_link_pic (info)
4223 || !SYMBOL_REFERENCES_LOCAL (info, h)))
4225 unresolved_reloc = FALSE;
4228 off = h->got.offset;
4229 tls_type = (((struct elf32_nios2_link_hash_entry *) h)
4234 if (local_got_offsets == NULL)
4236 off = local_got_offsets[r_symndx];
4237 tls_type = (elf32_nios2_local_got_tls_type (input_bfd)
4241 if (tls_type == GOT_UNKNOWN)
4248 bfd_boolean need_relocs = FALSE;
4249 Elf_Internal_Rela outrel;
4250 bfd_byte *loc = NULL;
4253 /* The GOT entries have not been initialized yet. Do it
4254 now, and emit any relocations. If both an IE GOT and a
4255 GD GOT are necessary, we emit the GD first. */
4257 if ((bfd_link_pic (info) || indx != 0)
4259 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4260 || h->root.type != bfd_link_hash_undefweak))
4263 if (htab->root.srelgot == NULL)
4265 loc = htab->root.srelgot->contents;
4266 loc += (htab->root.srelgot->reloc_count *
4267 sizeof (Elf32_External_Rela));
4270 if (tls_type & GOT_TLS_GD)
4274 outrel.r_addend = 0;
4275 outrel.r_offset = (htab->root.sgot->output_section->vma
4276 + htab->root.sgot->output_offset
4278 outrel.r_info = ELF32_R_INFO (indx,
4279 R_NIOS2_TLS_DTPMOD);
4281 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4283 htab->root.srelgot->reloc_count++;
4284 loc += sizeof (Elf32_External_Rela);
4287 bfd_put_32 (output_bfd,
4288 (relocation - dtpoff_base (info) -
4290 htab->root.sgot->contents + cur_off + 4);
4293 outrel.r_addend = 0;
4294 outrel.r_info = ELF32_R_INFO (indx,
4295 R_NIOS2_TLS_DTPREL);
4296 outrel.r_offset += 4;
4298 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4300 htab->root.srelgot->reloc_count++;
4301 loc += sizeof (Elf32_External_Rela);
4306 /* If we are not emitting relocations for a
4307 general dynamic reference, then we must be in a
4308 static link or an executable link with the
4309 symbol binding locally. Mark it as belonging
4310 to module 1, the executable. */
4311 bfd_put_32 (output_bfd, 1,
4312 htab->root.sgot->contents + cur_off);
4313 bfd_put_32 (output_bfd, (relocation -
4314 dtpoff_base (info) -
4316 htab->root.sgot->contents + cur_off + 4);
4322 if (tls_type & GOT_TLS_IE)
4327 outrel.r_addend = (relocation -
4328 dtpoff_base (info));
4330 outrel.r_addend = 0;
4331 outrel.r_offset = (htab->root.sgot->output_section->vma
4332 + htab->root.sgot->output_offset
4334 outrel.r_info = ELF32_R_INFO (indx,
4337 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4339 htab->root.srelgot->reloc_count++;
4340 loc += sizeof (Elf32_External_Rela);
4343 bfd_put_32 (output_bfd, (tpoff (info, relocation)
4345 htab->root.sgot->contents + cur_off);
4352 local_got_offsets[r_symndx] |= 1;
4355 if ((tls_type & GOT_TLS_GD) && r_type != R_NIOS2_TLS_GD16)
4357 relocation = htab->root.sgot->output_offset + off - got_base;
4359 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4360 contents, rel->r_offset,
4361 relocation, rel->r_addend);
4365 case R_NIOS2_TLS_LE16:
4366 if (bfd_link_dll (info))
4368 (*_bfd_error_handler)
4369 (_("%B(%A+0x%lx): R_NIOS2_TLS_LE16 relocation not "
4370 "permitted in shared object"),
4371 input_bfd, input_section,
4372 (long) rel->r_offset, howto->name);
4376 relocation = tpoff (info, relocation) - TP_OFFSET;
4378 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4379 contents, rel->r_offset,
4380 relocation, rel->r_addend);
4383 case R_NIOS2_BFD_RELOC_32:
4384 if (bfd_link_pic (info)
4385 && (input_section->flags & SEC_ALLOC) != 0
4387 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4388 || h->root.type != bfd_link_hash_undefweak))
4390 Elf_Internal_Rela outrel;
4392 bfd_boolean skip, relocate;
4394 /* When generating a shared object, these relocations
4395 are copied into the output file to be resolved at run
4402 = _bfd_elf_section_offset (output_bfd, info,
4403 input_section, rel->r_offset);
4404 if (outrel.r_offset == (bfd_vma) -1)
4406 else if (outrel.r_offset == (bfd_vma) -2)
4407 skip = TRUE, relocate = TRUE;
4408 outrel.r_offset += (input_section->output_section->vma
4409 + input_section->output_offset);
4412 memset (&outrel, 0, sizeof outrel);
4415 && (!bfd_link_pic (info)
4416 || !SYMBOLIC_BIND (info, h)
4417 || !h->def_regular))
4419 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4420 outrel.r_addend = rel->r_addend;
4424 /* This symbol is local, or marked to become local. */
4425 outrel.r_addend = relocation + rel->r_addend;
4427 outrel.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
4430 sreloc = elf_section_data (input_section)->sreloc;
4434 loc = sreloc->contents;
4435 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4436 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4438 /* This reloc will be computed at runtime, so there's no
4439 need to do anything now, except for R_NIOS2_BFD_RELOC_32
4440 relocations that have been turned into
4441 R_NIOS2_RELATIVE. */
4446 r = _bfd_final_link_relocate (howto, input_bfd,
4447 input_section, contents,
4448 rel->r_offset, relocation,
4452 case R_NIOS2_TLS_DTPREL:
4453 relocation -= dtpoff_base (info);
4457 r = _bfd_final_link_relocate (howto, input_bfd,
4458 input_section, contents,
4459 rel->r_offset, relocation,
4465 r = bfd_reloc_notsupported;
4467 if (r != bfd_reloc_ok)
4470 name = h->root.root.string;
4473 name = bfd_elf_string_from_elf_section (input_bfd,
4474 symtab_hdr->sh_link,
4476 if (name == NULL || *name == '\0')
4477 name = bfd_section_name (input_bfd, sec);
4482 case bfd_reloc_overflow:
4483 (*info->callbacks->reloc_overflow) (info, NULL, name,
4484 howto->name, (bfd_vma) 0,
4485 input_bfd, input_section,
4489 case bfd_reloc_undefined:
4490 (*info->callbacks->undefined_symbol) (info, name, input_bfd,
4492 rel->r_offset, TRUE);
4495 case bfd_reloc_outofrange:
4497 msg = _("relocation out of range");
4500 case bfd_reloc_notsupported:
4502 msg = _("unsupported relocation");
4505 case bfd_reloc_dangerous:
4507 msg = _("dangerous relocation");
4512 msg = _("unknown error");
4518 (*info->callbacks->warning) (info, msg, name, input_bfd,
4519 input_section, rel->r_offset);
4527 /* Implement elf-backend_section_flags:
4528 Convert NIOS2 specific section flags to bfd internal section flags. */
4530 nios2_elf32_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr)
4532 if (hdr->sh_flags & SHF_NIOS2_GPREL)
4533 *flags |= SEC_SMALL_DATA;
4538 /* Implement elf_backend_fake_sections:
4539 Set the correct type for an NIOS2 ELF section. We do this by the
4540 section name, which is a hack, but ought to work. */
4542 nios2_elf32_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
4543 Elf_Internal_Shdr *hdr, asection *sec)
4545 register const char *name = bfd_get_section_name (abfd, sec);
4547 if ((sec->flags & SEC_SMALL_DATA)
4548 || strcmp (name, ".sdata") == 0
4549 || strcmp (name, ".sbss") == 0
4550 || strcmp (name, ".lit4") == 0 || strcmp (name, ".lit8") == 0)
4551 hdr->sh_flags |= SHF_NIOS2_GPREL;
4556 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
4557 shortcuts to them in our hash table. */
4559 create_got_section (bfd *dynobj, struct bfd_link_info *info)
4561 struct elf32_nios2_link_hash_table *htab;
4562 struct elf_link_hash_entry *h;
4564 htab = elf32_nios2_hash_table (info);
4566 if (! _bfd_elf_create_got_section (dynobj, info))
4569 /* In order for the two loads in .PLTresolve to share the same %hiadj,
4570 _GLOBAL_OFFSET_TABLE_ must be aligned to a 16-byte boundary. */
4571 if (!bfd_set_section_alignment (dynobj, htab->root.sgotplt, 4))
4574 /* The Nios II ABI specifies that GOT-relative relocations are relative
4575 to the linker-created symbol _gp_got, rather than using
4576 _GLOBAL_OFFSET_TABLE_ directly. In particular, the latter always
4577 points to the base of the GOT while _gp_got may include a bias. */
4578 h = _bfd_elf_define_linkage_sym (dynobj, info, htab->root.sgotplt,
4580 elf32_nios2_hash_table (info)->h_gp_got = h;
4587 /* Implement elf_backend_create_dynamic_sections:
4588 Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
4589 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
4592 nios2_elf32_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
4594 struct elf32_nios2_link_hash_table *htab;
4596 htab = elf32_nios2_hash_table (info);
4597 if (!htab->root.sgot && !create_got_section (dynobj, info))
4600 _bfd_elf_create_dynamic_sections (dynobj, info);
4602 /* In order for the two loads in a shared object .PLTresolve to share the
4603 same %hiadj, the start of the PLT (as well as the GOT) must be aligned
4604 to a 16-byte boundary. This is because the addresses for these loads
4605 include the -(.plt+4) PIC correction. */
4606 if (!bfd_set_section_alignment (dynobj, htab->root.splt, 4))
4609 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
4612 if (!bfd_link_pic (info))
4614 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
4622 /* Implement elf_backend_copy_indirect_symbol:
4623 Copy the extra info we tack onto an elf_link_hash_entry. */
4625 nios2_elf32_copy_indirect_symbol (struct bfd_link_info *info,
4626 struct elf_link_hash_entry *dir,
4627 struct elf_link_hash_entry *ind)
4629 struct elf32_nios2_link_hash_entry *edir, *eind;
4631 edir = (struct elf32_nios2_link_hash_entry *) dir;
4632 eind = (struct elf32_nios2_link_hash_entry *) ind;
4634 if (eind->dyn_relocs != NULL)
4636 if (edir->dyn_relocs != NULL)
4638 struct elf32_nios2_dyn_relocs **pp;
4639 struct elf32_nios2_dyn_relocs *p;
4641 /* Add reloc counts against the indirect sym to the direct sym
4642 list. Merge any entries against the same section. */
4643 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
4645 struct elf32_nios2_dyn_relocs *q;
4647 for (q = edir->dyn_relocs; q != NULL; q = q->next)
4648 if (q->sec == p->sec)
4650 q->pc_count += p->pc_count;
4651 q->count += p->count;
4658 *pp = edir->dyn_relocs;
4661 edir->dyn_relocs = eind->dyn_relocs;
4662 eind->dyn_relocs = NULL;
4665 if (ind->root.type == bfd_link_hash_indirect
4666 && dir->got.refcount <= 0)
4668 edir->tls_type = eind->tls_type;
4669 eind->tls_type = GOT_UNKNOWN;
4672 edir->got_types_used |= eind->got_types_used;
4674 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
4677 /* Set the right machine number for a NIOS2 ELF file. */
4680 nios2_elf32_object_p (bfd *abfd)
4684 mach = elf_elfheader (abfd)->e_flags;
4689 case EF_NIOS2_ARCH_R1:
4690 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r1);
4692 case EF_NIOS2_ARCH_R2:
4693 bfd_default_set_arch_mach (abfd, bfd_arch_nios2, bfd_mach_nios2r2);
4700 /* Implement elf_backend_check_relocs:
4701 Look through the relocs for a section during the first phase. */
4703 nios2_elf32_check_relocs (bfd *abfd, struct bfd_link_info *info,
4704 asection *sec, const Elf_Internal_Rela *relocs)
4707 Elf_Internal_Shdr *symtab_hdr;
4708 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4709 const Elf_Internal_Rela *rel;
4710 const Elf_Internal_Rela *rel_end;
4711 struct elf32_nios2_link_hash_table *htab;
4714 asection *sreloc = NULL;
4715 bfd_signed_vma *local_got_refcounts;
4717 if (bfd_link_relocatable (info))
4720 dynobj = elf_hash_table (info)->dynobj;
4721 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4722 sym_hashes = elf_sym_hashes (abfd);
4723 sym_hashes_end = (sym_hashes
4724 + symtab_hdr->sh_size / sizeof (Elf32_External_Sym));
4725 if (!elf_bad_symtab (abfd))
4726 sym_hashes_end -= symtab_hdr->sh_info;
4727 local_got_refcounts = elf_local_got_refcounts (abfd);
4729 htab = elf32_nios2_hash_table (info);
4730 sgot = htab->root.sgot;
4731 srelgot = htab->root.srelgot;
4733 rel_end = relocs + sec->reloc_count;
4734 for (rel = relocs; rel < rel_end; rel++)
4736 unsigned int r_type;
4737 struct elf_link_hash_entry *h;
4738 unsigned long r_symndx;
4740 r_symndx = ELF32_R_SYM (rel->r_info);
4741 if (r_symndx < symtab_hdr->sh_info)
4745 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4746 while (h->root.type == bfd_link_hash_indirect
4747 || h->root.type == bfd_link_hash_warning)
4748 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4750 /* PR15323, ref flags aren't set for references in the same
4752 h->root.non_ir_ref = 1;
4755 r_type = ELF32_R_TYPE (rel->r_info);
4760 case R_NIOS2_GOT_LO:
4761 case R_NIOS2_GOT_HA:
4762 case R_NIOS2_CALL16:
4763 case R_NIOS2_CALL_LO:
4764 case R_NIOS2_CALL_HA:
4765 case R_NIOS2_TLS_GD16:
4766 case R_NIOS2_TLS_IE16:
4767 /* This symbol requires a global offset table entry. */
4769 int tls_type, old_tls_type;
4775 case R_NIOS2_GOT_LO:
4776 case R_NIOS2_GOT_HA:
4777 case R_NIOS2_CALL16:
4778 case R_NIOS2_CALL_LO:
4779 case R_NIOS2_CALL_HA:
4780 tls_type = GOT_NORMAL;
4782 case R_NIOS2_TLS_GD16:
4783 tls_type = GOT_TLS_GD;
4785 case R_NIOS2_TLS_IE16:
4786 tls_type = GOT_TLS_IE;
4792 /* Create the .got section. */
4793 elf_hash_table (info)->dynobj = dynobj = abfd;
4794 nios2_elf32_create_dynamic_sections (dynobj, info);
4799 sgot = htab->root.sgot;
4800 BFD_ASSERT (sgot != NULL);
4804 && (h != NULL || bfd_link_pic (info)))
4806 srelgot = htab->root.srelgot;
4807 BFD_ASSERT (srelgot != NULL);
4812 struct elf32_nios2_link_hash_entry *eh
4813 = (struct elf32_nios2_link_hash_entry *)h;
4815 old_tls_type = elf32_nios2_hash_entry(h)->tls_type;
4816 if (r_type == R_NIOS2_CALL16
4817 || r_type == R_NIOS2_CALL_LO
4818 || r_type == R_NIOS2_CALL_HA)
4820 /* Make sure a plt entry is created for this symbol if
4821 it turns out to be a function defined by a dynamic
4826 eh->got_types_used |= CALL_USED;
4829 eh->got_types_used |= GOT_USED;
4833 /* This is a global offset table entry for a local symbol. */
4834 if (local_got_refcounts == NULL)
4838 size = symtab_hdr->sh_info;
4839 size *= (sizeof (bfd_signed_vma) + sizeof (char));
4841 = ((bfd_signed_vma *) bfd_zalloc (abfd, size));
4842 if (local_got_refcounts == NULL)
4844 elf_local_got_refcounts (abfd) = local_got_refcounts;
4845 elf32_nios2_local_got_tls_type (abfd)
4846 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
4848 local_got_refcounts[r_symndx]++;
4849 old_tls_type = elf32_nios2_local_got_tls_type (abfd) [r_symndx];
4852 /* We will already have issued an error message if there is a
4853 TLS / non-TLS mismatch, based on the symbol type. We don't
4854 support any linker relaxations. So just combine any TLS
4856 if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL
4857 && tls_type != GOT_NORMAL)
4858 tls_type |= old_tls_type;
4860 if (old_tls_type != tls_type)
4863 elf32_nios2_hash_entry (h)->tls_type = tls_type;
4865 elf32_nios2_local_got_tls_type (abfd) [r_symndx] = tls_type;
4869 case R_NIOS2_TLS_LDM16:
4870 if (r_type == R_NIOS2_TLS_LDM16)
4871 htab->tls_ldm_got.refcount++;
4873 if (htab->root.sgot == NULL)
4875 if (htab->root.dynobj == NULL)
4876 htab->root.dynobj = abfd;
4877 if (!create_got_section (htab->root.dynobj, info))
4882 /* This relocation describes the C++ object vtable hierarchy.
4883 Reconstruct it for later use during GC. */
4884 case R_NIOS2_GNU_VTINHERIT:
4885 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4889 /* This relocation describes which C++ vtable entries are actually
4890 used. Record for later use during GC. */
4891 case R_NIOS2_GNU_VTENTRY:
4892 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4896 case R_NIOS2_BFD_RELOC_32:
4897 case R_NIOS2_CALL26:
4898 case R_NIOS2_CALL26_NOAT:
4899 case R_NIOS2_HIADJ16:
4904 /* If this reloc is in a read-only section, we might
4905 need a copy reloc. We can't check reliably at this
4906 stage whether the section is read-only, as input
4907 sections have not yet been mapped to output sections.
4908 Tentatively set the flag for now, and correct in
4909 adjust_dynamic_symbol. */
4910 if (!bfd_link_pic (info))
4913 /* Make sure a plt entry is created for this symbol if it
4914 turns out to be a function defined by a dynamic object. */
4917 if (r_type == R_NIOS2_CALL26 || r_type == R_NIOS2_CALL26_NOAT)
4921 /* If we are creating a shared library, we need to copy the
4922 reloc into the shared library. */
4923 if (bfd_link_pic (info)
4924 && (sec->flags & SEC_ALLOC) != 0
4925 && (r_type == R_NIOS2_BFD_RELOC_32
4926 || (h != NULL && ! h->needs_plt
4927 && (! SYMBOLIC_BIND (info, h) || ! h->def_regular))))
4929 struct elf32_nios2_dyn_relocs *p;
4930 struct elf32_nios2_dyn_relocs **head;
4932 /* When creating a shared object, we must copy these
4933 reloc types into the output file. We create a reloc
4934 section in dynobj and make room for this reloc. */
4937 sreloc = _bfd_elf_make_dynamic_reloc_section
4938 (sec, dynobj, 2, abfd, TRUE);
4943 /* If this is a global symbol, we count the number of
4944 relocations we need for this symbol. */
4946 head = &((struct elf32_nios2_link_hash_entry *) h)->dyn_relocs;
4949 /* Track dynamic relocs needed for local syms too.
4950 We really need local syms available to do this
4955 Elf_Internal_Sym *isym;
4957 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4962 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4966 vpp = &elf_section_data (s)->local_dynrel;
4967 head = (struct elf32_nios2_dyn_relocs **) vpp;
4971 if (p == NULL || p->sec != sec)
4973 bfd_size_type amt = sizeof *p;
4974 p = ((struct elf32_nios2_dyn_relocs *)
4975 bfd_alloc (htab->root.dynobj, amt));
4996 /* Implement elf_backend_gc_mark_hook:
4997 Return the section that should be marked against GC for a given
5000 nios2_elf32_gc_mark_hook (asection *sec,
5001 struct bfd_link_info *info,
5002 Elf_Internal_Rela *rel,
5003 struct elf_link_hash_entry *h,
5004 Elf_Internal_Sym *sym)
5007 switch (ELF32_R_TYPE (rel->r_info))
5009 case R_NIOS2_GNU_VTINHERIT:
5010 case R_NIOS2_GNU_VTENTRY:
5013 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5016 /* Implement elf_backend_gc_sweep_hook:
5017 Update the got entry reference counts for the section being removed. */
5019 nios2_elf32_gc_sweep_hook (bfd *abfd,
5020 struct bfd_link_info *info,
5022 const Elf_Internal_Rela *relocs)
5024 Elf_Internal_Shdr *symtab_hdr;
5025 struct elf_link_hash_entry **sym_hashes;
5026 bfd_signed_vma *local_got_refcounts;
5027 const Elf_Internal_Rela *rel, *relend;
5030 if (bfd_link_relocatable (info))
5033 elf_section_data (sec)->local_dynrel = NULL;
5035 dynobj = elf_hash_table (info)->dynobj;
5039 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5040 sym_hashes = elf_sym_hashes (abfd);
5041 local_got_refcounts = elf_local_got_refcounts (abfd);
5043 relend = relocs + sec->reloc_count;
5044 for (rel = relocs; rel < relend; rel++)
5046 unsigned long r_symndx;
5047 struct elf_link_hash_entry *h = NULL;
5050 r_symndx = ELF32_R_SYM (rel->r_info);
5051 if (r_symndx >= symtab_hdr->sh_info)
5053 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5054 while (h->root.type == bfd_link_hash_indirect
5055 || h->root.type == bfd_link_hash_warning)
5056 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5059 r_type = ELF32_R_TYPE (rel->r_info);
5063 case R_NIOS2_GOT_LO:
5064 case R_NIOS2_GOT_HA:
5065 case R_NIOS2_CALL16:
5066 case R_NIOS2_CALL_LO:
5067 case R_NIOS2_CALL_HA:
5070 if (h->got.refcount > 0)
5073 else if (local_got_refcounts != NULL)
5075 if (local_got_refcounts[r_symndx] > 0)
5076 --local_got_refcounts[r_symndx];
5080 case R_NIOS2_PCREL_LO:
5081 case R_NIOS2_PCREL_HA:
5082 case R_NIOS2_BFD_RELOC_32:
5083 case R_NIOS2_CALL26:
5084 case R_NIOS2_CALL26_NOAT:
5087 struct elf32_nios2_link_hash_entry *eh;
5088 struct elf32_nios2_dyn_relocs **pp;
5089 struct elf32_nios2_dyn_relocs *p;
5091 eh = (struct elf32_nios2_link_hash_entry *) h;
5093 if (h->plt.refcount > 0)
5096 if (r_type == R_NIOS2_PCREL_LO || r_type == R_NIOS2_PCREL_HA
5097 || r_type == R_NIOS2_BFD_RELOC_32)
5099 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;
5120 /* Implement elf_backend_finish_dynamic_symbols:
5121 Finish up dynamic symbol handling. We set the contents of various
5122 dynamic sections here. */
5124 nios2_elf32_finish_dynamic_symbol (bfd *output_bfd,
5125 struct bfd_link_info *info,
5126 struct elf_link_hash_entry *h,
5127 Elf_Internal_Sym *sym)
5129 struct elf32_nios2_link_hash_table *htab;
5130 struct elf32_nios2_link_hash_entry *eh
5131 = (struct elf32_nios2_link_hash_entry *)h;
5134 htab = elf32_nios2_hash_table (info);
5136 if (h->plt.offset != (bfd_vma) -1)
5143 Elf_Internal_Rela rela;
5145 bfd_vma got_address;
5147 /* This symbol has an entry in the procedure linkage table. Set
5149 BFD_ASSERT (h->dynindx != -1);
5150 splt = htab->root.splt;
5151 sgotplt = htab->root.sgotplt;
5152 srela = htab->root.srelplt;
5153 BFD_ASSERT (splt != NULL && sgotplt != NULL && srela != NULL);
5155 /* Emit the PLT entry. */
5156 if (bfd_link_pic (info))
5158 nios2_elf32_install_data (splt, nios2_so_plt_entry, h->plt.offset,
5160 plt_index = (h->plt.offset - 24) / 12;
5161 got_offset = (plt_index + 3) * 4;
5162 nios2_elf32_install_imm16 (splt, h->plt.offset,
5163 hiadj(plt_index * 4));
5164 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5165 (plt_index * 4) & 0xffff);
5166 nios2_elf32_install_imm16 (splt, h->plt.offset + 8,
5167 0xfff4 - h->plt.offset);
5168 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5171 /* Fill in the entry in the global offset table. There are no
5172 res_n slots for a shared object PLT, instead the .got.plt entries
5173 point to the PLT entries. */
5174 bfd_put_32 (output_bfd,
5175 splt->output_section->vma + splt->output_offset
5176 + h->plt.offset, sgotplt->contents + got_offset);
5180 plt_index = (h->plt.offset - 28 - htab->res_n_size) / 12;
5181 got_offset = (plt_index + 3) * 4;
5183 nios2_elf32_install_data (splt, nios2_plt_entry, h->plt.offset, 3);
5184 got_address = (sgotplt->output_section->vma + sgotplt->output_offset
5186 nios2_elf32_install_imm16 (splt, h->plt.offset, hiadj(got_address));
5187 nios2_elf32_install_imm16 (splt, h->plt.offset + 4,
5188 got_address & 0xffff);
5190 /* Fill in the entry in the global offset table. */
5191 bfd_put_32 (output_bfd,
5192 splt->output_section->vma + splt->output_offset
5193 + plt_index * 4, sgotplt->contents + got_offset);
5196 /* Fill in the entry in the .rela.plt section. */
5197 rela.r_offset = got_address;
5198 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_JUMP_SLOT);
5200 loc = srela->contents + plt_index * sizeof (Elf32_External_Rela);
5201 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5203 if (!h->def_regular)
5205 /* Mark the symbol as undefined, rather than as defined in
5206 the .plt section. Leave the value alone. */
5207 sym->st_shndx = SHN_UNDEF;
5208 /* If the symbol is weak, we do need to clear the value.
5209 Otherwise, the PLT entry would provide a definition for
5210 the symbol even if the symbol wasn't defined anywhere,
5211 and so the symbol would never be NULL. */
5212 if (!h->ref_regular_nonweak)
5217 use_plt = (eh->got_types_used == CALL_USED
5218 && h->plt.offset != (bfd_vma) -1);
5220 if (!use_plt && h->got.offset != (bfd_vma) -1
5221 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_GD) == 0
5222 && (elf32_nios2_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)
5226 Elf_Internal_Rela rela;
5230 /* This symbol has an entry in the global offset table. Set it
5232 sgot = htab->root.sgot;
5233 srela = htab->root.srelgot;
5234 BFD_ASSERT (sgot != NULL && srela != NULL);
5236 offset = (h->got.offset & ~(bfd_vma) 1);
5237 rela.r_offset = (sgot->output_section->vma
5238 + sgot->output_offset + offset);
5240 /* If this is a -Bsymbolic link, and the symbol is defined
5241 locally, we just want to emit a RELATIVE reloc. Likewise if
5242 the symbol was forced to be local because of a version file.
5243 The entry in the global offset table will already have been
5244 initialized in the relocate_section function. */
5246 if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
5248 rela.r_info = ELF32_R_INFO (0, R_NIOS2_RELATIVE);
5249 rela.r_addend = bfd_get_signed_32 (output_bfd,
5250 (sgot->contents + offset));
5251 bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset);
5255 bfd_put_32 (output_bfd, (bfd_vma) 0,
5256 sgot->contents + offset);
5257 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_GLOB_DAT);
5261 loc = srela->contents;
5262 loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5263 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5266 if (use_plt && h->got.offset != (bfd_vma) -1)
5268 bfd_vma offset = (h->got.offset & ~(bfd_vma) 1);
5269 asection *sgot = htab->root.sgot;
5270 asection *splt = htab->root.splt;
5271 bfd_put_32 (output_bfd, (splt->output_section->vma + splt->output_offset
5273 sgot->contents + offset);
5279 Elf_Internal_Rela rela;
5282 /* This symbol needs a copy reloc. Set it up. */
5283 BFD_ASSERT (h->dynindx != -1
5284 && (h->root.type == bfd_link_hash_defined
5285 || h->root.type == bfd_link_hash_defweak));
5288 BFD_ASSERT (s != NULL);
5290 rela.r_offset = (h->root.u.def.value
5291 + h->root.u.def.section->output_section->vma
5292 + h->root.u.def.section->output_offset);
5293 rela.r_info = ELF32_R_INFO (h->dynindx, R_NIOS2_COPY);
5295 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5296 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5299 /* Mark _DYNAMIC, _GLOBAL_OFFSET_TABLE_, and _gp_got as absolute. */
5300 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5301 || h == elf_hash_table (info)->hgot
5302 || h == elf32_nios2_hash_table (info)->h_gp_got)
5303 sym->st_shndx = SHN_ABS;
5308 /* Implement elf_backend_finish_dynamic_sections. */
5310 nios2_elf32_finish_dynamic_sections (bfd *output_bfd,
5311 struct bfd_link_info *info)
5316 struct elf32_nios2_link_hash_table *htab;
5318 htab = elf32_nios2_hash_table (info);
5319 dynobj = elf_hash_table (info)->dynobj;
5320 sgotplt = htab->root.sgotplt;
5321 BFD_ASSERT (sgotplt != NULL);
5322 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5324 if (elf_hash_table (info)->dynamic_sections_created)
5327 Elf32_External_Dyn *dyncon, *dynconend;
5329 splt = htab->root.splt;
5330 BFD_ASSERT (splt != NULL && sdyn != NULL);
5332 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5333 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5334 for (; dyncon < dynconend; dyncon++)
5336 Elf_Internal_Dyn dyn;
5339 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5347 s = htab->root.sgotplt;
5348 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5349 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5353 s = htab->root.srelplt;
5354 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5355 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5359 s = htab->root.srelplt;
5360 dyn.d_un.d_val = s->size;
5361 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5365 /* The procedure linkage table relocs (DT_JMPREL) should
5366 not be included in the overall relocs (DT_RELA).
5367 Therefore, we override the DT_RELASZ entry here to
5368 make it not include the JMPREL relocs. Since the
5369 linker script arranges for .rela.plt to follow all
5370 other relocation sections, we don't have to worry
5371 about changing the DT_RELA entry. */
5372 s = htab->root.srelplt;
5374 dyn.d_un.d_val -= s->size;
5375 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5379 s = htab->root.sgotplt;
5381 = s->output_section->vma + s->output_offset + 0x7ff0;
5382 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5387 /* Fill in the first entry in the procedure linkage table. */
5390 bfd_vma got_address = (sgotplt->output_section->vma
5391 + sgotplt->output_offset);
5392 if (bfd_link_pic (info))
5394 bfd_vma got_pcrel = got_address - (splt->output_section->vma
5395 + splt->output_offset);
5396 /* Both GOT and PLT must be aligned to a 16-byte boundary
5397 for the two loads to share the %hiadj part. The 4-byte
5398 offset for nextpc is accounted for in the %lo offsets
5400 BFD_ASSERT ((got_pcrel & 0xf) == 0);
5401 nios2_elf32_install_data (splt, nios2_so_plt0_entry, 0, 6);
5402 nios2_elf32_install_imm16 (splt, 4, hiadj (got_pcrel));
5403 nios2_elf32_install_imm16 (splt, 12, got_pcrel & 0xffff);
5404 nios2_elf32_install_imm16 (splt, 16, (got_pcrel + 4) & 0xffff);
5408 /* Divide by 4 here, not 3 because we already corrected for the
5410 bfd_vma res_size = (splt->size - 28) / 4;
5411 bfd_vma res_start = (splt->output_section->vma
5412 + splt->output_offset);
5415 for (res_offset = 0; res_offset < res_size; res_offset += 4)
5416 bfd_put_32 (output_bfd,
5417 6 | ((res_size - (res_offset + 4)) << 6),
5418 splt->contents + res_offset);
5420 /* The GOT must be aligned to a 16-byte boundary for the
5421 two loads to share the same %hiadj part. */
5422 BFD_ASSERT ((got_address & 0xf) == 0);
5424 nios2_elf32_install_data (splt, nios2_plt0_entry, res_size, 7);
5425 nios2_elf32_install_imm16 (splt, res_size, hiadj (res_start));
5426 nios2_elf32_install_imm16 (splt, res_size + 4,
5427 res_start & 0xffff);
5428 nios2_elf32_install_imm16 (splt, res_size + 12,
5429 hiadj (got_address));
5430 nios2_elf32_install_imm16 (splt, res_size + 16,
5431 (got_address + 4) & 0xffff);
5432 nios2_elf32_install_imm16 (splt, res_size + 20,
5433 (got_address + 8) & 0xffff);
5437 /* Fill in the first three entries in the global offset table. */
5438 if (sgotplt->size > 0)
5441 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents);
5443 bfd_put_32 (output_bfd,
5444 sdyn->output_section->vma + sdyn->output_offset,
5446 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 4);
5447 bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 8);
5450 elf_section_data (sgotplt->output_section)->this_hdr.sh_entsize = 4;
5455 /* Implement elf_backend_adjust_dynamic_symbol:
5456 Adjust a symbol defined by a dynamic object and referenced by a
5457 regular object. The current definition is in some section of the
5458 dynamic object, but we're not including those sections. We have to
5459 change the definition to something the rest of the link can
5462 nios2_elf32_adjust_dynamic_symbol (struct bfd_link_info *info,
5463 struct elf_link_hash_entry *h)
5465 struct elf32_nios2_link_hash_table *htab;
5470 htab = elf32_nios2_hash_table (info);
5471 dynobj = elf_hash_table (info)->dynobj;
5473 /* Make sure we know what is going on here. */
5474 BFD_ASSERT (dynobj != NULL
5476 || h->u.weakdef != NULL
5479 && !h->def_regular)));
5481 /* If this is a function, put it in the procedure linkage table. We
5482 will fill in the contents of the procedure linkage table later,
5483 when we know the address of the .got section. */
5484 if (h->type == STT_FUNC || h->needs_plt)
5486 if (h->plt.refcount <= 0
5487 || SYMBOL_CALLS_LOCAL (info, h)
5488 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5489 && h->root.type == bfd_link_hash_undefweak))
5491 /* This case can occur if we saw a PLT reloc in an input
5492 file, but the symbol was never referred to by a dynamic
5493 object, or if all references were garbage collected. In
5494 such a case, we don't actually need to build a procedure
5495 linkage table, and we can just do a PCREL reloc instead. */
5496 h->plt.offset = (bfd_vma) -1;
5503 /* Reinitialize the plt offset now that it is not used as a reference
5505 h->plt.offset = (bfd_vma) -1;
5507 /* If this is a weak symbol, and there is a real definition, the
5508 processor independent code will have arranged for us to see the
5509 real definition first, and we can just use the same value. */
5510 if (h->u.weakdef != NULL)
5512 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5513 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5514 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5515 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5519 /* If there are no non-GOT references, we do not need a copy
5521 if (!h->non_got_ref)
5524 /* This is a reference to a symbol defined by a dynamic object which
5526 If we are creating a shared library, we must presume that the
5527 only references to the symbol are via the global offset table.
5528 For such cases we need not do anything here; the relocations will
5529 be handled correctly by relocate_section. */
5530 if (bfd_link_pic (info))
5535 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5536 h->root.root.string);
5540 /* We must allocate the symbol in our .dynbss section, which will
5541 become part of the .bss section of the executable. There will be
5542 an entry for this symbol in the .dynsym section. The dynamic
5543 object will contain position independent code, so all references
5544 from the dynamic object to this symbol will go through the global
5545 offset table. The dynamic linker will use the .dynsym entry to
5546 determine the address it must put in the global offset table, so
5547 both the dynamic object and the regular object will refer to the
5548 same memory location for the variable. */
5550 BFD_ASSERT (s != NULL);
5552 /* We must generate a R_NIOS2_COPY reloc to tell the dynamic linker to
5553 copy the initial value out of the dynamic object and into the
5554 runtime process image. We need to remember the offset into the
5555 .rela.bss section we are going to use. */
5556 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5560 srel = htab->srelbss;
5561 BFD_ASSERT (srel != NULL);
5562 srel->size += sizeof (Elf32_External_Rela);
5566 align2 = bfd_log2 (h->size);
5567 if (align2 > h->root.u.def.section->alignment_power)
5568 align2 = h->root.u.def.section->alignment_power;
5571 s->size = BFD_ALIGN (s->size, (bfd_size_type)1 << align2);
5572 if (align2 > bfd_get_section_alignment (dynobj, s)
5573 && !bfd_set_section_alignment (dynobj, s, align2))
5576 /* Define the symbol as being at this point in the section. */
5577 h->root.u.def.section = s;
5578 h->root.u.def.value = s->size;
5580 /* Increment the section size to make room for the symbol. */
5586 /* Worker function for nios2_elf32_size_dynamic_sections. */
5588 adjust_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5590 struct bfd_link_info *info;
5591 struct elf32_nios2_link_hash_table *htab;
5593 if (h->root.type == bfd_link_hash_indirect)
5596 if (h->root.type == bfd_link_hash_warning)
5597 /* When warning symbols are created, they **replace** the "real"
5598 entry in the hash table, thus we never get to see the real
5599 symbol in a hash traversal. So look at it now. */
5600 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5602 info = (struct bfd_link_info *) inf;
5603 htab = elf32_nios2_hash_table (info);
5605 if (h->plt.offset != (bfd_vma)-1)
5606 h->plt.offset += htab->res_n_size;
5607 if (htab->root.splt == h->root.u.def.section)
5608 h->root.u.def.value += htab->res_n_size;
5613 /* Another worker function for nios2_elf32_size_dynamic_sections.
5614 Allocate space in .plt, .got and associated reloc sections for
5617 allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf)
5619 struct bfd_link_info *info;
5620 struct elf32_nios2_link_hash_table *htab;
5621 struct elf32_nios2_link_hash_entry *eh;
5622 struct elf32_nios2_dyn_relocs *p;
5625 if (h->root.type == bfd_link_hash_indirect)
5628 if (h->root.type == bfd_link_hash_warning)
5629 /* When warning symbols are created, they **replace** the "real"
5630 entry in the hash table, thus we never get to see the real
5631 symbol in a hash traversal. So look at it now. */
5632 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5634 info = (struct bfd_link_info *) inf;
5635 htab = elf32_nios2_hash_table (info);
5637 if (htab->root.dynamic_sections_created
5638 && h->plt.refcount > 0)
5640 /* Make sure this symbol is output as a dynamic symbol.
5641 Undefined weak syms won't yet be marked as dynamic. */
5642 if (h->dynindx == -1
5644 && !bfd_elf_link_record_dynamic_symbol (info, h))
5647 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h))
5649 asection *s = htab->root.splt;
5651 /* Allocate room for the header. */
5654 if (bfd_link_pic (info))
5660 h->plt.offset = s->size;
5662 /* If this symbol is not defined in a regular file, and we are
5663 not generating a shared library, then set the symbol to this
5664 location in the .plt. This is required to make function
5665 pointers compare as equal between the normal executable and
5666 the shared library. */
5667 if (! bfd_link_pic (info)
5670 h->root.u.def.section = s;
5671 h->root.u.def.value = h->plt.offset;
5674 /* Make room for this entry. */
5677 /* We also need to make an entry in the .rela.plt section. */
5678 htab->root.srelplt->size += sizeof (Elf32_External_Rela);
5680 /* And the .got.plt section. */
5681 htab->root.sgotplt->size += 4;
5685 h->plt.offset = (bfd_vma) -1;
5691 h->plt.offset = (bfd_vma) -1;
5695 eh = (struct elf32_nios2_link_hash_entry *) h;
5696 use_plt = (eh->got_types_used == CALL_USED
5697 && h->plt.offset != (bfd_vma) -1);
5699 if (h->got.refcount > 0)
5703 int tls_type = eh->tls_type;
5706 /* Make sure this symbol is output as a dynamic symbol.
5707 Undefined weak syms won't yet be marked as dynamic. */
5708 if (h->dynindx == -1
5710 && !bfd_elf_link_record_dynamic_symbol (info, h))
5713 s = htab->root.sgot;
5714 h->got.offset = s->size;
5716 if (tls_type == GOT_UNKNOWN)
5719 if (tls_type == GOT_NORMAL)
5720 /* Non-TLS symbols need one GOT slot. */
5724 if (tls_type & GOT_TLS_GD)
5725 /* R_NIOS2_TLS_GD16 needs 2 consecutive GOT slots. */
5727 if (tls_type & GOT_TLS_IE)
5728 /* R_NIOS2_TLS_IE16 needs one GOT slot. */
5732 dyn = htab->root.dynamic_sections_created;
5735 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
5736 && (!bfd_link_pic (info)
5737 || !SYMBOL_REFERENCES_LOCAL (info, h)))
5740 if (tls_type != GOT_NORMAL
5741 && (bfd_link_pic (info) || indx != 0)
5742 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5743 || h->root.type != bfd_link_hash_undefweak))
5745 if (tls_type & GOT_TLS_IE)
5746 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5748 if (tls_type & GOT_TLS_GD)
5749 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5751 if ((tls_type & GOT_TLS_GD) && indx != 0)
5752 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5754 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5755 || h->root.type != bfd_link_hash_undefweak)
5757 && (bfd_link_pic (info)
5758 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
5759 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5762 h->got.offset = (bfd_vma) -1;
5764 if (eh->dyn_relocs == NULL)
5767 /* In the shared -Bsymbolic case, discard space allocated for
5768 dynamic pc-relative relocs against symbols which turn out to be
5769 defined in regular objects. For the normal shared case, discard
5770 space for pc-relative relocs that have become local due to symbol
5771 visibility changes. */
5773 if (bfd_link_pic (info))
5776 && (h->forced_local || SYMBOLIC_BIND (info, h)))
5778 struct elf32_nios2_dyn_relocs **pp;
5780 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5782 p->count -= p->pc_count;
5791 /* Also discard relocs on undefined weak syms with non-default
5793 if (eh->dyn_relocs != NULL
5794 && h->root.type == bfd_link_hash_undefweak)
5796 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5797 eh->dyn_relocs = NULL;
5799 /* Make sure undefined weak symbols are output as a dynamic
5801 else if (h->dynindx == -1
5803 && !bfd_elf_link_record_dynamic_symbol (info, h))
5809 /* For the non-shared case, discard space for relocs against
5810 symbols which turn out to need copy relocs or are not
5814 && ((h->def_dynamic && !h->def_regular)
5815 || (htab->root.dynamic_sections_created
5816 && (h->root.type == bfd_link_hash_undefweak
5817 || h->root.type == bfd_link_hash_undefined))))
5819 /* Make sure this symbol is output as a dynamic symbol.
5820 Undefined weak syms won't yet be marked as dynamic. */
5821 if (h->dynindx == -1
5823 && !bfd_elf_link_record_dynamic_symbol (info, h))
5826 /* If that succeeded, we know we'll be keeping all the
5828 if (h->dynindx != -1)
5832 eh->dyn_relocs = NULL;
5837 /* Finally, allocate space. */
5838 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5840 asection *sreloc = elf_section_data (p->sec)->sreloc;
5841 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5847 /* Implement elf_backend_size_dynamic_sections:
5848 Set the sizes of the dynamic sections. */
5850 nios2_elf32_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5851 struct bfd_link_info *info)
5859 struct elf32_nios2_link_hash_table *htab;
5861 htab = elf32_nios2_hash_table (info);
5862 dynobj = elf_hash_table (info)->dynobj;
5863 BFD_ASSERT (dynobj != NULL);
5865 htab->res_n_size = 0;
5866 if (elf_hash_table (info)->dynamic_sections_created)
5868 /* Set the contents of the .interp section to the interpreter. */
5869 if (bfd_link_executable (info) && !info->nointerp)
5871 s = bfd_get_linker_section (dynobj, ".interp");
5872 BFD_ASSERT (s != NULL);
5873 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5874 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5879 /* We may have created entries in the .rela.got section.
5880 However, if we are not creating the dynamic sections, we will
5881 not actually use these entries. Reset the size of .rela.got,
5882 which will cause it to get stripped from the output file
5884 s = htab->root.srelgot;
5889 /* Set up .got offsets for local syms, and space for local dynamic
5891 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5893 bfd_signed_vma *local_got;
5894 bfd_signed_vma *end_local_got;
5895 char *local_tls_type;
5896 bfd_size_type locsymcount;
5897 Elf_Internal_Shdr *symtab_hdr;
5900 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
5903 for (s = ibfd->sections; s != NULL; s = s->next)
5905 struct elf32_nios2_dyn_relocs *p;
5907 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
5909 if (!bfd_is_abs_section (p->sec)
5910 && bfd_is_abs_section (p->sec->output_section))
5912 /* Input section has been discarded, either because
5913 it is a copy of a linkonce section or due to
5914 linker script /DISCARD/, so we'll be discarding
5917 else if (p->count != 0)
5919 srel = elf_section_data (p->sec)->sreloc;
5920 srel->size += p->count * sizeof (Elf32_External_Rela);
5921 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
5922 info->flags |= DF_TEXTREL;
5927 local_got = elf_local_got_refcounts (ibfd);
5931 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
5932 locsymcount = symtab_hdr->sh_info;
5933 end_local_got = local_got + locsymcount;
5934 local_tls_type = elf32_nios2_local_got_tls_type (ibfd);
5935 s = htab->root.sgot;
5936 srel = htab->root.srelgot;
5937 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
5941 *local_got = s->size;
5942 if (*local_tls_type & GOT_TLS_GD)
5943 /* TLS_GD relocs need an 8-byte structure in the GOT. */
5945 if (*local_tls_type & GOT_TLS_IE)
5947 if (*local_tls_type == GOT_NORMAL)
5950 if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD)
5951 srel->size += sizeof (Elf32_External_Rela);
5954 *local_got = (bfd_vma) -1;
5958 if (htab->tls_ldm_got.refcount > 0)
5960 /* Allocate two GOT entries and one dynamic relocation (if necessary)
5961 for R_NIOS2_TLS_LDM16 relocations. */
5962 htab->tls_ldm_got.offset = htab->root.sgot->size;
5963 htab->root.sgot->size += 8;
5964 if (bfd_link_pic (info))
5965 htab->root.srelgot->size += sizeof (Elf32_External_Rela);
5968 htab->tls_ldm_got.offset = -1;
5970 /* Allocate global sym .plt and .got entries, and space for global
5971 sym dynamic relocs. */
5972 elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info);
5974 if (elf_hash_table (info)->dynamic_sections_created)
5976 /* If the .got section is more than 0x8000 bytes, we add
5977 0x8000 to the value of _gp_got, so that 16-bit relocations
5978 have a greater chance of working. */
5979 if (htab->root.sgot->size >= 0x8000
5980 && elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value == 0)
5981 elf32_nios2_hash_table (info)->h_gp_got->root.u.def.value = 0x8000;
5984 /* The check_relocs and adjust_dynamic_symbol entry points have
5985 determined the sizes of the various dynamic sections. Allocate
5990 for (s = dynobj->sections; s != NULL; s = s->next)
5994 if ((s->flags & SEC_LINKER_CREATED) == 0)
5997 /* It's OK to base decisions on the section name, because none
5998 of the dynobj section names depend upon the input files. */
5999 name = bfd_get_section_name (dynobj, s);
6001 if (strcmp (name, ".plt") == 0)
6003 /* Remember whether there is a PLT. */
6006 /* Correct for the number of res_N branches. */
6007 if (plt && !bfd_link_pic (info))
6009 htab->res_n_size = (s->size-28) / 3;
6010 s->size += htab->res_n_size;
6013 else if (CONST_STRNEQ (name, ".rela"))
6019 /* We use the reloc_count field as a counter if we need
6020 to copy relocs into the output file. */
6024 else if (CONST_STRNEQ (name, ".got"))
6026 else if (strcmp (name, ".dynbss") != 0)
6027 /* It's not one of our sections, so don't allocate space. */
6032 /* If we don't need this section, strip it from the
6033 output file. This is mostly to handle .rela.bss and
6034 .rela.plt. We must create both sections in
6035 create_dynamic_sections, because they must be created
6036 before the linker maps input sections to output
6037 sections. The linker does that before
6038 adjust_dynamic_symbol is called, and it is that
6039 function which decides whether anything needs to go
6040 into these sections. */
6041 s->flags |= SEC_EXCLUDE;
6045 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6048 /* Allocate memory for the section contents. */
6049 /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
6050 Unused entries should be reclaimed before the section's contents
6051 are written out, but at the moment this does not happen. Thus in
6052 order to prevent writing out garbage, we initialize the section's
6053 contents to zero. */
6054 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
6055 if (s->contents == NULL)
6059 /* Adjust dynamic symbols that point to the plt to account for the
6060 now-known number of resN slots. */
6061 if (htab->res_n_size)
6062 elf_link_hash_traverse (& htab->root, adjust_dynrelocs, info);
6064 if (elf_hash_table (info)->dynamic_sections_created)
6066 /* Add some entries to the .dynamic section. We fill in the
6067 values later, in elf_nios2_finish_dynamic_sections, but we
6068 must add the entries now so that we get the correct size for
6069 the .dynamic section. The DT_DEBUG entry is filled in by the
6070 dynamic linker and used by the debugger. */
6071 #define add_dynamic_entry(TAG, VAL) \
6072 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6074 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_DEBUG, 0))
6077 if (got && !add_dynamic_entry (DT_PLTGOT, 0))
6081 && (!add_dynamic_entry (DT_PLTRELSZ, 0)
6082 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6083 || !add_dynamic_entry (DT_JMPREL, 0)))
6087 && (!add_dynamic_entry (DT_RELA, 0)
6088 || !add_dynamic_entry (DT_RELASZ, 0)
6089 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))))
6092 if (!bfd_link_pic (info) && !add_dynamic_entry (DT_NIOS2_GP, 0))
6095 if ((info->flags & DF_TEXTREL) != 0
6096 && !add_dynamic_entry (DT_TEXTREL, 0))
6099 #undef add_dynamic_entry
6104 /* Free the derived linker hash table. */
6106 nios2_elf32_link_hash_table_free (bfd *obfd)
6108 struct elf32_nios2_link_hash_table *htab
6109 = (struct elf32_nios2_link_hash_table *) obfd->link.hash;
6111 bfd_hash_table_free (&htab->bstab);
6112 _bfd_elf_link_hash_table_free (obfd);
6115 /* Implement bfd_elf32_bfd_link_hash_table_create. */
6116 static struct bfd_link_hash_table *
6117 nios2_elf32_link_hash_table_create (bfd *abfd)
6119 struct elf32_nios2_link_hash_table *ret;
6120 bfd_size_type amt = sizeof (struct elf32_nios2_link_hash_table);
6122 ret = bfd_zmalloc (amt);
6126 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
6129 elf32_nios2_link_hash_entry),
6136 /* Init the stub hash table too. */
6137 if (!bfd_hash_table_init (&ret->bstab, stub_hash_newfunc,
6138 sizeof (struct elf32_nios2_stub_hash_entry)))
6140 _bfd_elf_link_hash_table_free (abfd);
6143 ret->root.root.hash_table_free = nios2_elf32_link_hash_table_free;
6145 return &ret->root.root;
6148 /* Implement elf_backend_reloc_type_class. */
6149 static enum elf_reloc_type_class
6150 nios2_elf32_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6151 const asection *rel_sec ATTRIBUTE_UNUSED,
6152 const Elf_Internal_Rela *rela)
6154 switch ((int) ELF32_R_TYPE (rela->r_info))
6156 case R_NIOS2_RELATIVE:
6157 return reloc_class_relative;
6158 case R_NIOS2_JUMP_SLOT:
6159 return reloc_class_plt;
6161 return reloc_class_copy;
6163 return reloc_class_normal;
6167 /* Return 1 if target is one of ours. */
6169 is_nios2_elf_target (const struct bfd_target *targ)
6171 return (targ == &nios2_elf32_le_vec
6172 || targ == &nios2_elf32_be_vec);
6175 /* Implement elf_backend_add_symbol_hook.
6176 This hook is called by the linker when adding symbols from an object
6177 file. We use it to put .comm items in .sbss, and not .bss. */
6179 nios2_elf_add_symbol_hook (bfd *abfd,
6180 struct bfd_link_info *info,
6181 Elf_Internal_Sym *sym,
6182 const char **namep ATTRIBUTE_UNUSED,
6183 flagword *flagsp ATTRIBUTE_UNUSED,
6189 if (sym->st_shndx == SHN_COMMON
6190 && !bfd_link_relocatable (info)
6191 && sym->st_size <= elf_gp_size (abfd)
6192 && is_nios2_elf_target (info->output_bfd->xvec))
6194 /* Common symbols less than or equal to -G nn bytes are automatically
6196 struct elf32_nios2_link_hash_table *htab;
6198 htab = elf32_nios2_hash_table (info);
6199 if (htab->sbss == NULL)
6201 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
6203 dynobj = elf_hash_table (info)->dynobj;
6207 htab->sbss = bfd_make_section_anyway_with_flags (dynobj, ".sbss",
6209 if (htab->sbss == NULL)
6214 *valp = sym->st_size;
6220 /* Implement elf_backend_can_make_relative_eh_frame:
6221 Decide whether to attempt to turn absptr or lsda encodings in
6222 shared libraries into pcrel within the given input section. */
6224 nios2_elf32_can_make_relative_eh_frame (bfd *input_bfd ATTRIBUTE_UNUSED,
6225 struct bfd_link_info *info
6227 asection *eh_frame_section
6230 /* We can't use PC-relative encodings in the .eh_frame section. */
6234 /* Implement elf_backend_special_sections. */
6235 const struct bfd_elf_special_section elf32_nios2_special_sections[] =
6237 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS,
6238 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6239 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS,
6240 SHF_ALLOC + SHF_WRITE + SHF_NIOS2_GPREL },
6241 { NULL, 0, 0, 0, 0 }
6244 #define ELF_ARCH bfd_arch_nios2
6245 #define ELF_TARGET_ID NIOS2_ELF_DATA
6246 #define ELF_MACHINE_CODE EM_ALTERA_NIOS2
6248 /* The Nios II MMU uses a 4K page size. */
6250 #define ELF_MAXPAGESIZE 0x1000
6252 #define bfd_elf32_bfd_link_hash_table_create \
6253 nios2_elf32_link_hash_table_create
6255 #define bfd_elf32_bfd_merge_private_bfd_data \
6256 nios2_elf32_merge_private_bfd_data
6258 /* Relocation table lookup macros. */
6260 #define bfd_elf32_bfd_reloc_type_lookup nios2_elf32_bfd_reloc_type_lookup
6261 #define bfd_elf32_bfd_reloc_name_lookup nios2_elf32_bfd_reloc_name_lookup
6263 /* JUMP_TABLE_LINK macros. */
6265 /* elf_info_to_howto (using RELA relocations). */
6267 #define elf_info_to_howto nios2_elf32_info_to_howto
6269 /* elf backend functions. */
6271 #define elf_backend_can_gc_sections 1
6272 #define elf_backend_can_refcount 1
6273 #define elf_backend_plt_readonly 1
6274 #define elf_backend_want_got_plt 1
6275 #define elf_backend_rela_normal 1
6277 #define elf_backend_relocate_section nios2_elf32_relocate_section
6278 #define elf_backend_section_flags nios2_elf32_section_flags
6279 #define elf_backend_fake_sections nios2_elf32_fake_sections
6280 #define elf_backend_check_relocs nios2_elf32_check_relocs
6282 #define elf_backend_gc_mark_hook nios2_elf32_gc_mark_hook
6283 #define elf_backend_gc_sweep_hook nios2_elf32_gc_sweep_hook
6284 #define elf_backend_create_dynamic_sections \
6285 nios2_elf32_create_dynamic_sections
6286 #define elf_backend_finish_dynamic_symbol nios2_elf32_finish_dynamic_symbol
6287 #define elf_backend_finish_dynamic_sections \
6288 nios2_elf32_finish_dynamic_sections
6289 #define elf_backend_adjust_dynamic_symbol nios2_elf32_adjust_dynamic_symbol
6290 #define elf_backend_reloc_type_class nios2_elf32_reloc_type_class
6291 #define elf_backend_size_dynamic_sections nios2_elf32_size_dynamic_sections
6292 #define elf_backend_add_symbol_hook nios2_elf_add_symbol_hook
6293 #define elf_backend_copy_indirect_symbol nios2_elf32_copy_indirect_symbol
6294 #define elf_backend_object_p nios2_elf32_object_p
6296 #define elf_backend_grok_prstatus nios2_grok_prstatus
6297 #define elf_backend_grok_psinfo nios2_grok_psinfo
6299 #undef elf_backend_can_make_relative_eh_frame
6300 #define elf_backend_can_make_relative_eh_frame \
6301 nios2_elf32_can_make_relative_eh_frame
6303 #define elf_backend_special_sections elf32_nios2_special_sections
6305 #define TARGET_LITTLE_SYM nios2_elf32_le_vec
6306 #define TARGET_LITTLE_NAME "elf32-littlenios2"
6307 #define TARGET_BIG_SYM nios2_elf32_be_vec
6308 #define TARGET_BIG_NAME "elf32-bignios2"
6310 #define elf_backend_got_header_size 12
6311 #define elf_backend_default_execstack 0
6313 #include "elf32-target.h"